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

                                 SCHEDULE 13G/A

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 2)*

                           InfraSource Services, Inc.
                                (Name of Issuer)

                         Common Stock, $0.001 par value
                         (Title of Class of Securities)

                                    45684P102
                                 (CUSIP Number)

                                December 31, 2007
             (Date of Event Which Requires Filing of this statement)


     Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

     [ ]  Rule 13d-1(b)
     [X] Rule 13d-1(c)
     [ ] Rule 13d-1(d)





----------------
     *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 the disclosures provided in a prior cover page.

     The information required in the remainder of this cover page shall not be
deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act
of 1934 ("Act") 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).









                               Page 1 of 8 Pages



CUSIP No. 45684P102                 13G/A               Page 2 of 8 Pages


-----------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)

            GLG Partners LP
-----------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (SEE INSTRUCTIONS)
                                                               (a)  [X]
                                                               (b)  [ ]
-----------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            United Kingdom
-----------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         ________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       ________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ________________________________________________________

PERSON WITH:  (8)   SHARED DISPOSITIVE POWER
                    0
-----------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            0
-----------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
                                                                    [ ]
-----------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            0.0%
-----------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
            PN
-----------------------------------------------------------------------




CUSIP No. 45684P102                 13G/A               Page 3 of 8 Pages


-----------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)

            GLG Partners Limited
-----------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (SEE INSTRUCTIONS)
                                                               (a)  [X]
                                                               (b)  [ ]
-----------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION

            United Kingdom
-----------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         ________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       ________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ________________________________________________________

PERSON WITH:   (8)  SHARED DISPOSITIVE POWER
                    0
-----------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY
            OWNED BY EACH REPORTING PERSON
            0
-----------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
                                                                    [ ]
-----------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            0.0%
-----------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
            IA, HC
-----------------------------------------------------------------------





CUSIP No. 45684P102                 13G/A               Page 4 of 8 Pages


-----------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)

            GLG Partners, Inc.
-----------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
            (SEE INSTRUCTIONS)
                                                               (a)  [X]
                                                               (b)  [ ]
-----------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION

            Delaware
-----------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         ________________________________________________________
BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       ________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      ________________________________________________________

PERSON WITH:   (8)  SHARED DISPOSITIVE POWER
                    0
-----------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY
            OWNED BY EACH REPORTING PERSON
            0
-----------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
                                                                    [ ]
-----------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            0.0%
-----------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
            CO
-----------------------------------------------------------------------





CUSIP No. 45684P102                  13G/A                Page 5 of 8 Pages


This Amendment No. 2 (this "Amendment") amends the statement on Schedule 13G
filed on June 21, 2006 as amended by Amendment No. 1 filed on February 14,
2007(as amended, the "Schedule 13G") with respect to shares of Common Stock, par
value $0.001 per share (the "Shares") of InfraSource Services, Inc., a Delaware
corporation (the "Company"). Capitalized terms used herein and not otherwise
defined in this Amendment have the meanings set forth in the Schedule 13G. This
Amendment amends and restates Items 2(a), 2(b), 2(c), 4, 5 and 10 in their
entirety as set forth below.

Item 2(a).  Name of Person Filing

         This statement is filed by the entities and persons listed below, who
         are collectively referred to herein as "Reporting Persons," with
         respect to the Shares:

         INVESTMENT MANAGER

         (i)      GLG Partners LP (the "Investment Manager"), with respect to
                  the Shares held by certain funds to which the Investment
                  Manager serves as investment manager (the "GLG Funds").

         GENERAL PARTNER

         (ii)     GLG Partners Limited (the "General Partner"), which serves as
                  the general partner of the Investment Manager, with respect to
                  the Shares held by each of the GLG Funds.

         PARENT COMPANY

         (iii)    GLG Partners, Inc. (the "Parent Company"), which indirectly
                  wholly owns the General Partner, with respect to the Shares
                  held by each of the GLG Funds.

         The Investment Manager serves as the investment manager to each of the
         GLG Funds. The General Partner serves as the general partner to the
         Investment Manager. The Parent Company indirectly wholly owns the
         General Partner.

         On November 2, 2007, the General Partner, the Investment Manager and
         certain additional entities were directly or indirectly acquired by
         the Parent Company (formerly named Freedom Acquisition Holdings,
         Inc.). The Parent Company is publicly listed on the New York Stock
         Exchange under the ticker symbol GLG.

Item 2(b).  Address of Principal Business Office or, if none, Residence

         The address of the principal business office of the Parent Company is:

         390 Park Avenue, 20th Floor
         New York, New York 10022

         The address of the principal business office of each of the other
Reporting Persons is:

         c/o GLG Partners LP
         1 Curzon Street
         London W1J 5HB
         United Kingdom



CUSIP No. 45684P102                  13G/A                Page 6 of 8 Pages


Item 2(c).  Citizenship

         Citizenship is set forth in Row 4 of the cover page for each Reporting
         Person hereto and is incorporated herein by reference for each such
         Reporting Person.


Item 4.   Ownership

            Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.

         The information required by Items 4(a) - (c) is set forth in Rows 5 -
         11 of the cover page for each Reporting Person hereto and is
         incorporated herein by reference for each such Reporting Person. Based
         upon the Company's Quarterly Report filed on Form 10-Q for the
         quarterly period ended June 30, 2007, the Company had 41,012,416 Shares
         outstanding as of July 31, 2007.

         The Investment Manager, which serves as the investment manager to each
         of the GLG Funds, may be deemed to be the beneficial owner of all
         Shares owned by the GLG Funds. The Investment Manager exercises its
         investment authority directly or indirectly through various entities,
         including, without limitation, GLG Inc. The General Partner, as general
         partner to the Investment Manager, may be deemed to be the beneficial
         owner of all Shares owned by the GLG Funds. Each of Emmanuel Roman,
         Pierre Lagrange and Noam Gottesman are Managing Directors of the
         General Partner. The Parent Company, which indirectly wholly owns the
         General Partner, may be deemed to be the beneficial owner of all Shares
         owned by the GLG Funds. Each of the Investment Manager, the General
         Partner, the Parent Company, GLG Inc., Emmanuel Roman, Pierre Lagrange
         and Noam Gottesman hereby disclaims any beneficial ownership of any
         such Shares, except for their pecuniary interest therein.


Item 5.  Ownership of Five Percent or Less of a Class

         If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following: [X]


Item 10. Certification

         By signing below each of the undersigned certifies that, to the best of
its knowledge and belief, the securities referred to above were not acquired and
are not held for the purpose of or with the effect of changing or influencing
the control of the issuer of the securities and were not acquired and are not
held in connection with or as a participant in any transaction having that
purpose or effect.

Exhibits:

Exhibit I: Joint Filing Agreement, dated as of February 14, 2008, by and among
GLG Partners, Inc., GLG Partners LP and GLG Partners Limited.






CUSIP No. 45684P102                  13G/A                Page 7 of 8 Pages


                                   SIGNATURES

         After reasonable inquiry and to the best of its knowledge and belief,
each of the undersigned certifies that the information with respect to it set
forth in this statement is true, complete, and correct.

Dated: February 14, 2008



GLG PARTNERS LP
      Individually and in its capacity as Investment Manager

GLG PARTNERS LIMITED
      Individually and in its capacity as General Partner of GLG Partners LP

      By: /s/ Timothy Kuschill
          ---------------------------
          Timothy Kuschill
          Counsel of GLG Partners LP

      By: /s/ Victoria Parry
          ---------------------------
          Victoria Parry, Attorney-in-Fact
          On behalf of Emmanuel Roman, Managing Director, GLG Partners Limited





GLG PARTNERS, INC.

      By: /s/ Alejandro R. San Miguel
          ---------------------------
          Name: Alejandro R. San Miguel
          Title: General Counsel and Corporate Secretary

The Power of Attorney, dated January 14, 2008, executed by Emmanuel Roman,
authorizing Victoria Parry to sign and file this Schedule 13G/A on Emmanuel
Roman's behalf, which was filed with the Schedule 13G/A filed with the
Securities and Exchange Commission on February 14, 2008 by such Reporting
Persons with respect to the common stock of American Oil & Gas, Inc., is hereby
incorporated by reference.








CUSIP No. 45684P102                  13G/A                Page 8 of 8 Pages


                                    EXHIBIT I

                             JOINT FILING AGREEMENT

This will confirm the agreement by and among the undersigned that the Schedule
13G filed with the Securities and Exchange Commission on or about the date
hereof with respect to the beneficial ownership by the undersigned of the Shares
is being filed, and all amendments thereto will be filed, on behalf of each of
the persons and entities named below in accordance with Rule 13d-1(k) under the
Securities Exchange Act of 1934, as amended. This Agreement may be executed in
two or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

Dated as of February 14, 2008



GLG PARTNERS LP
      Individually and in its capacity as Investment Manager

GLG PARTNERS LIMITED
      Individually and in its capacity as General Partner of GLG Partners LP

      By: /s/ Timothy Kuschill
          ---------------------------
          Timothy Kuschill
          Counsel of GLG Partners LP

      By: /s/ Victoria Parry
          ---------------------------
          Victoria Parry, Attorney-in-Fact
          On behalf of Emmanuel Roman, Managing Director, GLG Partners Limited



GLG PARTNERS, INC.

      By: /s/ Alejandro R. San Miguel
          ---------------------------
          Name: Alejandro R. San Miguel
          Title: General Counsel and Corporate Secretary