UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D
                                 (Rule 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
                 TO RULES 13D-1(a) AND AMENDMENTS THERETO FILED
                            PURSUANT TO RULE 13D-2(a)

                                (AMENDMENT NO. )*

                            Michael Baker Corporation

--------------------------------------------------------------------------------
                                (Name of issuer)

                     Common Stock, par value $1.00 per share

--------------------------------------------------------------------------------
                         (Title of class of securities)

                                    057149106

--------------------------------------------------------------------------------
                                 (CUSIP number)

                                    COPY TO:
                              Matthew J. Day, Esq.
                        118 E. 25th Street, Eighth Floor
                            New York, New York 10010
                                 (212) 673-0484
--------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                 Communications)

                                  May 14, 2003

--------------------------------------------------------------------------------
            (Dates of Events which Require Filing of this Statement)

     If the filing person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the
following box. [ ]
                         Note. Schedules filed in paper format shall include a
               signed original and five copies of the schedule, including all
               exhibits. See Rule 13d-7 for other parties to whom copies are to
               be sent.

                         (Continued on following pages)

                              (Page 1 of 22 Pages)


---------------

     *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

     The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



-------------------                                                 ------------
CUSIP NO. 057149106                                                 Page 2 of 22
-------------------                                                 ------------


                                  SCHEDULE 13D


--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
     Acquisitor Holdings (Bermuda) Ltd.
     No IRS Identification Number
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*             (a)  [ ]
                                                                   (b)  [x]
--------------------------------------------------------------------------------
3.   SEC USE ONLY

--------------------------------------------------------------------------------
4.   SOURCE OF FUNDS
     WC
--------------------------------------------------------------------------------
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                     [ ]
--------------------------------------------------------------------------------
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
     Bermuda
--------------------------------------------------------------------------------
                   7.     SOLE VOTING POWER
 NUMBER OF                410,800
 SHARES            -------------------------------------------------------------
 BENEFICIALLY      8.     SHARED VOTING POWER
 OWNED BY                 0
 EACH              -------------------------------------------------------------
 REPORTING         9.     SOLE DISPOSITIVE POWER
 PERSON                   410,800
 WITH              -------------------------------------------------------------
                   10.    SHARED DISPOSITIVE POWER
                          0
--------------------------------------------------------------------------------
11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     410,800
--------------------------------------------------------------------------------
12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*
--------------------------------------------------------------------------------
13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     5.0%
--------------------------------------------------------------------------------
14.  TYPE OF REPORTING PERSON *
     CO
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



-------------------                                                 ------------
CUSIP NO. 057149106                                                 Page 3 of 22
-------------------                                                 ------------


                                  SCHEDULE 13D


--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
     J O Hambro Capital Management Group Limited
     No IRS Identification Number
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*             (a)  [ ]
                                                                   (b)  [x]
--------------------------------------------------------------------------------
3.   SEC USE ONLY

--------------------------------------------------------------------------------
4.   SOURCE OF FUNDS
     AF
--------------------------------------------------------------------------------
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                     [ ]
--------------------------------------------------------------------------------
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
     England
--------------------------------------------------------------------------------
                   7.     SOLE VOTING POWER
 NUMBER OF                0
 SHARES            -------------------------------------------------------------
 BENEFICIALLY      8.     SHARED VOTING POWER
 OWNED BY                 61,900
 EACH              -------------------------------------------------------------
 REPORTING         9.     SOLE DISPOSITIVE POWER
 PERSON                   0
 WITH              -------------------------------------------------------------
                   10.    SHARED DISPOSITIVE POWER
                          61,900
--------------------------------------------------------------------------------
11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     61,900
--------------------------------------------------------------------------------
12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*
--------------------------------------------------------------------------------
13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     0.8%
--------------------------------------------------------------------------------
14.  TYPE OF REPORTING PERSON *
     HC
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



-------------------                                                 ------------
CUSIP NO. 057149106                                                 Page 4 of 22
-------------------                                                 ------------


                                  SCHEDULE 13D


--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
     J O Hambro Capital Management Limited
     No IRS Identification Number
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*             (a)  [ ]
                                                                   (b)  [x]
--------------------------------------------------------------------------------
3.   SEC USE ONLY

--------------------------------------------------------------------------------
4.   SOURCE OF FUNDS
     AF
--------------------------------------------------------------------------------
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                     [ ]
--------------------------------------------------------------------------------
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
     England
--------------------------------------------------------------------------------
                   7.     SOLE VOTING POWER
 NUMBER OF                0
 SHARES            -------------------------------------------------------------
 BENEFICIALLY      8.     SHARED VOTING POWER
 OWNED BY                 61,900
 EACH              -------------------------------------------------------------
 REPORTING         9.     SOLE DISPOSITIVE POWER
 PERSON                   0
 WITH              -------------------------------------------------------------
                   10.    SHARED DISPOSITIVE POWER
                          61,900
--------------------------------------------------------------------------------
11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     61,900
--------------------------------------------------------------------------------
12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*
--------------------------------------------------------------------------------
13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     0.8%
--------------------------------------------------------------------------------
14.  TYPE OF REPORTING PERSON *
     IA
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



-------------------                                                 ------------
CUSIP NO. 057149106                                                 Page 5 of 22
-------------------                                                 ------------


                                  SCHEDULE 13D


--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
     Christopher Harwood Bernard Mills
     No IRS Identification Number
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*             (a)  [ ]
                                                                   (b)  [x]
--------------------------------------------------------------------------------
3.   SEC USE ONLY

--------------------------------------------------------------------------------
4.   SOURCE OF FUNDS
     AF
--------------------------------------------------------------------------------
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                     [ ]
--------------------------------------------------------------------------------
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
     England
--------------------------------------------------------------------------------
                   7.     SOLE VOTING POWER
 NUMBER OF                0
 SHARES            -------------------------------------------------------------
 BENEFICIALLY      8.     SHARED VOTING POWER
 OWNED BY                 472,700
 EACH              -------------------------------------------------------------
 REPORTING         9.     SOLE DISPOSITIVE POWER
 PERSON                   0
 WITH              -------------------------------------------------------------
                   10.    SHARED DISPOSITIVE POWER
                          472,700
--------------------------------------------------------------------------------
11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     472,700
--------------------------------------------------------------------------------
12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*
--------------------------------------------------------------------------------
13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     5.7%
--------------------------------------------------------------------------------
14.  TYPE OF REPORTING PERSON *
     IN
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



-------------------                                                 ------------
CUSIP NO. 057149106                                                 Page 6 of 22
-------------------                                                 ------------


                                  SCHEDULE 13D


--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSONS
     I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
     American Opportunity Trust plc
     No IRS Identification Number
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*             (a)  [ ]
                                                                   (b)  [x]
--------------------------------------------------------------------------------
3.   SEC USE ONLY

--------------------------------------------------------------------------------
4.   SOURCE OF FUNDS
     WC
--------------------------------------------------------------------------------
5.   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
     ITEM 2(d) or 2(e)                                                     [ ]
--------------------------------------------------------------------------------
6.   CITIZENSHIP OR PLACE OF ORGANIZATION
     England
--------------------------------------------------------------------------------
                   7.     SOLE VOTING POWER
 NUMBER OF                0
 SHARES            -------------------------------------------------------------
 BENEFICIALLY      8.     SHARED VOTING POWER
 OWNED BY                 61,900
 EACH              -------------------------------------------------------------
 REPORTING         9.     SOLE DISPOSITIVE POWER
 PERSON                   0
 WITH              -------------------------------------------------------------
                   10.    SHARED DISPOSITIVE POWER
                          61,900
--------------------------------------------------------------------------------
11.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     61,900
--------------------------------------------------------------------------------
12.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES*
--------------------------------------------------------------------------------
13.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     0.8%
--------------------------------------------------------------------------------
14.  TYPE OF REPORTING PERSON *
     IV
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!



                            STATEMENT ON SCHEDULE 13D
                            -------------------------

          This Statement on Schedule 13D (the "Statement") is filed on behalf of
the Filing Parties (defined below).

ITEM 1.   SECURITY AND ISSUER.

          The class  of equity securities to which this Statement relates is the
common  stock,  par value $1.00 per share (the "Common Stock"), of Michael Baker
Corporation, a Pennsylvania corporation (the "Issuer").  The principal executive
offices  of  the Issuer are located at Airside Business Park, 100 Airside Drive,
Moon  Township,  Pennsylvania  15108.

ITEM 2.   IDENTITY AND BACKGROUND.

          2  (a-c,f).

          I.   FILING PARTIES:
               --------------

          This  Statement  is filed on behalf of the following five persons, who
are  collectively  referred  to  as  the  "Filing  Parties":

1.        Acquisitor  Holdings (Bermuda) Ltd., a company incorporated in Bermuda
          ("Acquisitor"),  with  a business address of Clarendon House, 2 Church
          Street,  Hamilton  HM  11,  Bermuda. Acquisitor was formed in 2002 and
          endeavors  to  achieve  a  high  rate  of  capital  growth  for  its
          shareholders  by acquiring significant holdings in companies which the
          members  of  its Board of Directors consider to be fundamentally sound
          but which are valued at a discount to the Directors' estimate of their
          private market value. Acquisitor is managed by its Board of Directors.

2.        J  O Hambro Capital Management Group Limited ("J O Hambro Group") is a
          corporation  organized  under  the  laws of England with its principal
          office  and  business at Ryder Court, 14 Ryder Street, London SW1Y 6QB
          England.  J  O  Hambro Group functions as the ultimate holding company
          for  J  O  Hambro  Capital  Management  Limited.

3.        J  O  Hambro  Capital  Management  Limited  ("J  O  Hambro  Capital
          Management") is a corporation organized under the laws of England with
          its  principal  office  and  business at Ryder Court, 14 Ryder Street,
          London  SW1Y 6QB England. J O Hambro Capital Management is principally
          engaged  in  the  business  of  investment management and advising. It
          serves  as  co-investment  adviser to North Atlantic Smaller Companies
          Investment  Trust  plc  ("NASCIT")  and American Opportunity Trust plc
          ("American  Opportunity  Trust")  and  as  investment  adviser to Oryx
          International Growth Fund Limited ("Oryx"), The Trident North Atlantic
          Fund  ("Trident  North  Atlantic")  and  The  Trident  European  Fund
          ("Trident  European"),  as  well  as  to  private  clients.

4.        Christopher  Harwood Bernard Mills is a British citizen whose business
          address  is Ryder Court, 14 Ryder Street, London SW1Y 6QB England. His
          principal  employment includes service as executive director of NASCIT
          and American Opportunity Trust, as a director of J O Hambro Group, J O
          Hambro  Capital  Management,  Trident North Atlantic, Oryx, Acquisitor
          plc  and  Acquisitor,  and  as  co-investment  adviser  to  NASCIT and
          American  Opportunity  Trust.

5.        American  Opportunity  Trust is a corporation organized under the laws
          of  England  with its principal office and business at Ryder Court, 14
          Ryder Street, London SW1Y 6QB England. American Opportunity Trust is a
          publicly-held  investment  trust  company. Christopher Harwood Bernard
          Mills  and  J  O  Hambro  Capital  Management  serve  as co-investment
          advisers  to  American  Opportunity  Trust.


                                  Page 7 of 22

II.       CONTROL RELATIONSHIPS:
          ---------------------

          J  O  Hambro  Capital  Management  is a wholly-owned subsidiary of J O
Hambro  Group.

          Christopher  Harwood  Bernard Mills serves as a director of J O Hambro
Group,  J O Hambro Capital Management, and Acquisitor, and as executive director
of  American  Opportunity  Trust.


III.      EXECUTIVE OFFICERS AND DIRECTORS:
          --------------------------------

          In accordance with the provisions of General Instruction C to Schedule
13D,  information  concerning the executive officers and directors of the Filing
Parties  is  included  in  Schedule  A  hereto  and is incorporated by reference
herein.

          (d)  Criminal  Proceedings
               ---------------------

          During  the  last  five  years,  neither  the  Filing  Parties  (or  a
controlling  entity thereof) nor any executive officer or director of any of the
Filing  Parties  (or  a  controlling  entity  thereof)  has  been convicted in a
criminal  proceeding  (excluding  traffic  violations  or similar misdemeanors).

          (e)  Civil  Securities  Law  Proceedings
               -----------------------------------

          During  the  last  five  years,  neither  the  Filing  Parties  (or  a
controlling  entity thereof) nor any executive officer or director of any of the
Filing  Parties  (or  a  controlling entity thereof) has been a party to a civil
proceeding of a judicial or administrative body of competent jurisdiction and as
a  result  of  such  proceeding was or is subject to a judgment, decree or final
order  enjoining  future  violations  of, or prohibiting or mandating activities
subject  to,  federal  or  state  securities  laws or finding any violation with
respect  to  such  laws.

ITEM 3.   SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

          The  aggregate  purchase  price  of the 410,800 shares of Common Stock
beneficially  held  by  Acquisitor  is  $4,132,277.  All of the shares of Common
Stock  beneficially  owned by Acquisitor were paid for using its working capital
funds.

          The  aggregate  purchase  price  of  the 61,900 shares of Common Stock
beneficially  held  by  American  Opportunity  Trust  is  $537,199 (exclusive of
brokerage fees and commissions).  All of the shares of Common Stock beneficially
held  by  American  Opportunity  Trust  were  paid for using its working capital
funds.

ITEM 4.   PURPOSE OF TRANSACTION.

     The  Filing  Parties  believe that the shares of Common Stock of the Issuer
are  undervalued  and  represent  an  attractive  investment  opportunity.  They
presently  have  no plans or proposals which would relate to or result in any of
the  matters  set  forth  in  subparagraphs  (a) - (j) of Item 4 of Schedule 13D
except  as  set  forth  herein.  The  Filing  Parties  intend  to  have  open
communications with the Issuer's management in order to monitor their efforts to
increase  stockholder  value.  Depending  on  various factors including, without
limitation,  the  Issuer's financial position and investment strategy, the price
levels  of  the shares of Common Stock, conditions in the securities markets and
general  economic  and industry conditions, the Filing Parties may in the future
take  such  actions  with respect to their investment in the Issuer as they deem
appropriate, including without limitation purchasing additional shares of Common
Stock  in the open market or otherwise, making an offer to purchase up to all of
the Issuer's outstanding shares of Common Stock through a negotiated transaction
or  otherwise,  seeking  to  elect a slate of directors to the Issuer's board of
directors  or  presenting proposals for stockholders' consideration at an annual
or  special  meeting  of  the Issuer's stockholders. The Filing Parties may also
sell  some  or all of their shares of Common Stock in the open market or through
privately negotiated transactions, or change their intention with respect to any
and  all  matters  referred  to  in  this  Item  4.


                                  Page 8 of 22

ITEM  5.  INTEREST  IN  SECURITIES  OF  THE  ISSUER.

          (a)-(b)  The aggregate number and percentage of the outstanding Common
Stock  of  the  Issuer beneficially owned (i) by each of the Filing Parties, and
(ii)  to  the  knowledge  of the Filing Parties, by each other person who may be
deemed  to  be  a  member  of  the  group,  is  as  follows:



                                                 Number of         Number of
                                                Shares: Sole     Shares: Shared
                            Aggregate Number  Power to Vote or  Power to Vote or  Approximate
Filing Party                   of Shares          Dispose           Dispose       Percentage*
----------------------------------------------------------------------------------------------
                                                                      
Acquisitor                           410,800           410,800                 0         4.95%
J O Hambro Group                      61,900                 0            61,900         0.75%
J O Hambro Capital                    61,900                 0            61,900         0.75%
Management
Christopher H. B. Mills              472,700                 0           472,700         5.69%
American Opportunity Trust            61,900                 0            61,900         0.75%
----------------------------------------------------------------------------------------------


     *  Based  on  8,303,123 shares of Common Stock, par value $1.00 per share,
outstanding as of March 17, 2003, which is based on information reported in the
Issuer's Annual Report on Form 10-K, for the year ended December 31, 2002.


                                  Page 9 of 22

          (c)  During  the  past  60  days,  the  Filing  Parties  effected  no
transactions  in  the  Common  Stock other than those set forth in the following
table:



---------  ----------------------------------  -----------  ----------------  ------
  Date     Filing Party                        Buy or Sell  Number of Shares  Price
---------  ----------------------------------  -----------  ----------------  ------
                                                                  
---------  ----------------------------------  -----------  ----------------  ------
 4/2/2003  Acquisitor Holdings (Bermuda) Ltd.  Buy                     7,200  $ 8.43
---------  ----------------------------------  -----------  ----------------  ------
5/14/2003  Acquisitor Holdings (Bermuda) Ltd.  Buy                   168,900  $ 8.55
---------  ----------------------------------  -----------  ----------------  ------


          All of the above transactions were effected on the open market.

          (d)  No  person  other  than  the  Filing Parties is known to have the
right  to  receive, or the power to direct the receipt of dividends from, or the
proceeds  from  the  sale  of,  such  shares  of  Common  Stock.

ITEM 6.   CONTRACTS,  ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
          TO  SECURITIES  OF  THE  ISSUER.

          As  co-investment  advisers to American Opportunity Trust, Christopher
Harwood  Bernard  Mills  and  J  O  Hambro Capital Management share the right to
transfer  and  vote  the shares of the Common Stock of the Issuer pursuant to an
agreement dated as of January 7, 1993 between American Opportunity Trust and J O
Hambro  Capital  Management.

          On  May  27,  2003,  the  Filing Parties entered into the Joint Filing
Agreement,  which  is  attached  hereto as an exhibit and incorporated herein by
reference.

ITEM 7.   MATERIAL  TO  BE  FILED  AS  EXHIBITS.

          The  following  documents  are  filed  herewith  or  incorporated  by
reference  herein:

          (a)  Administration, Management and Custody Management Agreement dated
as  of  January  7,  1993  between  J  O  Hambro Capital Management and American
Opportunity  Trust.

          (b)  Joint  Filing  Agreement  dated  as  of May 27, 2003 by and among
Acquisitor Holdings (Bermuda) Ltd., J O Hambro Capital Management Group Limited,
J  O  Hambro  Capital  Management  Limited,  American  Opportunity Trust Plc and
Christopher  H.  B.  Mills.


                                  Page 10 of 22

                                    SIGNATURE

     After  reasonable  inquiry  and to the best of our knowledge and belief, we
certify  that  the information set forth in this statement is true, complete and
correct.

Dated:  May 27, 2003



ACQUISITOR HOLDINGS (BERMUDA) LTD.          J O HAMBRO CAPITAL MANAGEMENT GROUP
                                            LIMITED


By: /s/ Duncan Soukup                       By: /s/ R. G. Barrett
---------------------------                 ---------------------------
Name:  Duncan Soukup                        Name:  R. G. Barrett
Title: Deputy Chairman                      Title: Director


J O HAMBRO CAPITAL MANAGEMENT LIMITED       AMERICAN OPPORTUNITY TRUST PLC
                                            By: J O Hambro Capital Management
                                            Limited, Its investment advisor


By:  /s/ R. G. Barrett                      By:  /s/ R. G. Barrett
---------------------------                 ---------------------------
Name:  R. G. Barrett                        Name:  R. G. Barrett
Title: Director                             Title: Director


/s/  Christopher  Mills
---------------------------
CHRISTOPHER  MILLS


                                  Page 11 of 22

                                   SCHEDULE A

  Information Concerning Directors and Executive Officers of the Filing Parties

The following table sets forth certain information concerning each of the
directors and executive officers of Acquisitor Holdings (Bermuda) Ltd.
("Acquisitor") as of the date hereof.



                    
Name:                  Duncan Soukup
                       (Deputy Chairman)
Citizenship:           British
Business Address:      118 E. 25th Street, 8th Floor
                       New York, New York 10010
                       USA
Principal Occupation:  Deputy Chairman, Acquisitor
                       Managing Director, Acquisitor plc
                       President and Chief Executive Officer, Lionheart Group, Inc.
                       Managing Director, New York Holdings Ltd.

Name:                  Luke Oliver Johnson
                       (Director)
Citizenship:           British
Business Address:      Clarendon House
                       2 Church Street
                       Hamilton HM 11
                       Bermuda
Principal Occupation:  Director, Acquisitor
                       Director, Acquisitor plc
                       Chairman, Signature Restaurants plc

Name:                  John Stanislas Albert Radziwill
                       (Chairman)
Citizenship:           British
Business Address:      Clarendon House
                       2 Church Street
                       Hamilton HM 11
                       Bermuda
Principal Occupation:  Chairman, Acquisitor
                       Chairman, Acquisitor plc
                       Chairman and Chief Executive Officer, New York Holdings
                       Ltd.
                       Director, Goldcrown Group Limited
                       Director, International Assets Holding Corporation

Name:                  James Ozanne
                       (Non-Executive Director)
Citizenship:           USA
Business Address:      Clarendon House
                       2 Church Street
                       Hamilton HM 11
                       Bermuda
Principal Occupation:  Non-Executive Director, Acquisitor
                       Principal, Greenrange Partners
                       Director, Financial Security Assurance


                                  Page 12 of 22

Name:                  Christopher Harwood Bernard Mills
                       (Non-Executive Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Non-Executive Director, Acquisitor
                       Non-Executive Director, Acquisitor plc
                       Executive Director, NASCIT
                       Executive Director, American Opportunity Trust
                       Director, J O Hambro Capital Management

Name:                  Peter Melhado
                       (Non-Executive Director)
Citizenship:           USA
Business Address:      Clarendon House
                       2 Church Street
                       Hamilton HM 11
                       Bermuda
Principal Occupation:  Non-Executive Director, Acquisitor
                       General Partner, Polaris Partners, L.P.

Name:                  Timothy James Carey Lovell
                       (Non-Executive Director and Assistant Secretary)
Citizenship:           British
Business Address:      9 Walton Street
                       1st Floor
                       London
                       England SW3 2JD
Principal Occupation:  Finance Director, Acquisitor plc


                                  Page 13 of 22

The following table sets forth certain information concerning each of the
directors and executive officers of J O Hambro Capital Management Group Limited
("J O Hambro Group") as of the date hereof.


Name:                  James Daryl Hambro
                       (Chairman)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Chairman, J O Hambro Capital Management


Name:                  Christopher Harwood Bernard Mills
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Non-Executive Director, Acquisitor
                       Non-Executive Director, Acquisitor plc
                       Executive Director, NASCIT
                       Executive Director, American Opportunity Trust
                       Director, J O Hambro Capital Management

Name:                  Nichola Pease
                       (Director and Chief Executive)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director and Chief Executive, J O Hambro Capital
                       Management

Name:                  Basil Postan
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management


                                  Page 14 of 22

Name:                  Graham Warner
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management

Name:                  Robert George Barrett
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management


Name:                  Nicholas James Measham
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management


Name:                  Willem Vinke
                       (Director)
Citizenship:           Dutch
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management


                                  Page 15 of 22

The following table sets forth certain information concerning each of the
directors and executive officers of J O Hambro Capital Management Limited ("J O
Hambro Capital Management") as of the date hereof.


Name:                  James Daryl Hambro
                       (Managing Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Managing Director, J O Hambro Capital Management


Name:                  Christopher Harwood Bernard Mills
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Non-Executive Director, Acquisitor
                       Non-Executive Director, Acquisitor plc
                       Executive Director, NASCIT
                       Executive Director, American Opportunity Trust
                       Director, J O Hambro Capital Management


Name:                  Nichola Pease
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director and Chief Executive, J O Hambro Capital
                       Management


                                  Page 16 of 22

Name:                  Basil Postan
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management


Name:                  Robert George Barrett
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management


Name:                  Nicholas James Measham
                       (Director)
Citizenship:           British
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management

Name:                  Willem Vinke
                       (Director)
Citizenship:           Dutch
Business Address:      J O Hambro Capital Management Limited
                       Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Director, J O Hambro Capital Management


                                  Page 17 of 22

The following table sets forth certain information concerning each of the
directors and executive officers of American Opportunity Trust plc ("American
Opportunity Trust") as of the date hereof.


Name:                  R. Alexander Hammond-Chambers
                       (Chairman)
Citizenship:           British
Business Address:      29 Rutland Square
                       Edinburgh EH1 2BW
                       Scotland
Principal Occupation:  Non-Executive Director, American Opportunity Trust


Name:                  Christopher Harwood Bernard Mills
                       (Executive Director)
Citizenship:           British
Business Address:      Ryder Court
                       14 Ryder Street
                       London SW1Y 6QB
                       England
Principal Occupation:  Non-Executive Director, Acquisitor
                       Non-Executive Director, Acquisitor plc
                       Executive Director, American Opportunity Trust
                       Executive Director, NASCIT
                       Director, J O Hambro Capital Management


Name:                  John Gildea
                       (Director)
Citizenship:           USA
Business Address:      Gildea Management Company(1)
                       537 Steamboat Road
                       Greenwich, Connecticut 06830
Principal Occupation:  Managing Director, Gildea Management Company


Name:                  The Hon. James J. Nelson
                       (Director)
Citizenship:           British
Business Address:      Foreign & Colonial Ventures(2)
                       4th Floor
                       Berkeley Square House
                       Berkeley Square
                       London W1X 5PA
                       England
Principal Occupation:  Director, Foreign & Colonial Ventures



---------------
     (1)  Gildea  Management  Company  is  principally engaged in the investment
management business.

     (2)  Foreign  &  Colonial Ventures is principally engaged in the investment
management business.


                                  Page 18 of 22

Name:                  Iain Tulloch
                       (Director)
Citizenship:           British
Business Address:      Murray Johnstone Ltd.(3)
                       7 West Nile Street
                       Glasgow G2 2PX
                       Scotland
Principal Occupation:  Director, Murray Johnstone Ltd.


Name:                  Philip Ehrman
                       (Director)
Citizenship:           British
Business Address:      Gartmore Investment Management Ltd.(4)
                       Gartmore House
                       16-18 Monument Street
                       London EC3R 8AJ
                       England
Principal Occupation:  Investment Manager, Gartmore Investment Management Ltd.




---------------
     (3)  Murray  Johnstone  Ltd.  is  principally  engaged  in  the  investment
management business.

     (4)  Gartmore  Investment  Management Limited is principally engaged in the
investment management business.



                                  Page 19 of 22

                                  Exhibit Index

The following documents are filed herewith or incorporated herein by reference:



                        Exhibit                                                    Page
                                                                 
     (a) Administration, Management and Custody Management          Incorporated by reference to Exhibit
Agreement dated as of January 7, 1993 between J O Hambro            (a) of the Schedule 13D Amendment
Capital Management  and American Opportunity Trust.                 No. 1 filed on February 20, 2001 by
                                                                    Acquisitor plc and the other parties
                                                                      thereto with respect to Colorado
                                                                               MEDtech Inc.

     (b)  Joint  Filing  Agreement  dated  as of  May 27, 2003                      22
among Acquisitor Holdings (Bermuda) Ltd., J O Hambro Capital
Management Group Limited, J O Hambro Capital Management
Limited, American Opportunity Trust and Christopher H. B. Mills.



                                  Page 20 of 22

                             JOINT FILING AGREEMENT

                                  By and Among

                       ACQUISITOR HOLDINGS (BERMUDA) LTD.

                   J O HAMBRO CAPITAL MANAGEMENT GROUP LIMITED

                      J O HAMBRO CAPITAL MANAGEMENT LIMITED

                         AMERICAN OPPORTUNITY TRUST PLC

                                       and

                             CHRISTOPHER H. B. MILLS





                               As of May 27, 2003



                                  Page 21 of 22

                             JOINT FILING AGREEMENT

     The  undersigned  hereby agree that the Statement on Schedule 13D dated May
27,  2003  ("Statement")  with  respect to the shares of common stock, $1.00 par
value,  of  Michael  Baker  Corporation  is hereby filed on behalf of each of us
pursuant to and in accordance with the provisions of Rule 13d-1(k)(1)(iii) under
the  Securities  Exchange  Act  of  1934,  as  amended.

     The  undersigned hereby agree that any amendments to the Statement executed
by  each  or any of us shall be filed on behalf of each of us pursuant to and in
accordance  with  the provisions of Rule  13d-1(k)(1)(iii)  under the Securities
Exchange  Act  of  1934,  as  amended.

     This  Agreement  may  be  executed  in separate counterparts, each of which
shall  be deemed an original, but all of which shall constitute one and the same
instrument.

Date:  May 27, 2003

ACQUISITOR HOLDINGS (BERMUDA) LTD.          J O HAMBRO CAPITAL MANAGEMENT GROUP
                                            LIMITED


By: /s/ Duncan Soukup                       By: /s/ R. G. Barrett
---------------------------                 ---------------------------
Name:  Duncan Soukup                        Name:  R. G. Barrett
Title: Deputy Chairman                      Title: Director


J O HAMBRO CAPITAL MANAGEMENT LIMITED       AMERICAN OPPORTUNITY TRUST PLC

                                            By: J O Hambro Capital Management
                                            Limited, Its investment advisor


By:  /s/ R. G. Barrett                      By:  /s/ R. G. Barrett
---------------------------                 ---------------------------
Name:  R. G. Barrett                        Name:  R. G. Barrett
Title: Director                             Title: Director


/s/  Christopher Mills
---------------------------
CHRISTOPHER MILLS


                                  Page 22 of 22