Document:

<PAGE>

                                                                   Exhibit 10.30

                               FOURTH AMENDMENT TO
                              INVESTMENT AGREEMENT

     THIS FOURTH AMENDMENT TO INVESTMENT AGREEMENT (this "Fourth Amendment") is
made as of February 11, 2003 by and between OPINION RESEARCH CORPORATION, a
Delaware corporation (the "Company") and ALLIED CAPITAL CORPORATION and ALLIED
INVESTMENT CORPORATION, each a Maryland corporation (collectively referred to
herein as "Allied Capital").

                                    RECITALS:

     A.   Allied Capital invested the aggregate sum of Fifteen Million Dollars
($15,000,000) in the Company, in exchange for certain subordinated debentures of
the Company and Warrants to purchase shares of Common Stock of the Company
pursuant to that certain Investment Agreement dated as of May 26, 1999 by and
between the Company and Allied Capital (as amended, the "Investment Agreement").

     B.   The parties desire to modify certain provisions of the Investment
Agreement.

          NOW, THEREFORE, in consideration of the foregoing Recitals and the
mutual covenants contained herein, and other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, Allied Capital and
its successors and assigns with respect to any of the Debentures or any of the
Warrants (as those terms are hereinafter defined) (individually, a "Holder" and
collectively, the "Holders") and the Company hereby agree as follows:

          1.   Definitions. All capitalized terms used herein without definition
shall have the meanings given to such terms in the Investment Agreement.

          2.   Amendments to Investment Agreement. The following amendments to
the Investment Agreement shall take effect as of the date hereof:

               (a)  The definition of "Interest Rate" in Section 1.1, Defined
Terms, is hereby deleted in its entirety and amended and restated as follows:

               ""Interest Rate" means a rate of interest of twelve and one-half
percent (12.5%) per annum, which is payable quarterly in arrears."

               (b)  Notwithstanding the provisions of Section 5.13(b) of the
Investment Agreement, the Company shall maintain the following minimum ratios of
EBITDA for the 12 month period ending on the last day of such calendar quarter
ending on the date set forth below to Principal and Interest for the 12 month
period ending on the last day of such calendar quarter:

<PAGE>

               Period                              Ratio
               ------                              -----
          June 30, 2003                            1.20:1
          September 30, 2003                       1.20:1
          December 31, 2003                        1.20:1
          March 31, 2004 and thereafter            1.60:1

          3.   Closing Conditions. The obligations of Allied Capital to enter
into this Fourth Amendment and to perform its obligations hereunder are subject
to the satisfaction of the following conditions on or prior to the date hereof:

               (a)  The representations and warranties set forth herein shall be
true and correct on and as of the date hereof.

               (b)  The Company shall be in compliance with all the terms and
provisions set forth herein and in each other Investment Document on its part to
be observed or performed, and at the time of and immediately after the date
hereof, no Event of Default or Default or event or condition that, after the
giving of notice, passage of time, failure to cure or all of the foregoing would
constitute an Event of Default, shall have occurred and be continuing.

               (c)  Allied Capital shall have received the following items:

                    (i)   this Fourth Amendment, duly executed by the Company;

                    (ii)  a duly executed copy of the Ninth Amendment to the
Credit Agreement by and between the Company and the Senior Lender;

                    (iii) a Guaranty, in substantially the form attached hereto
as Exhibit A, duly executed by ORC Telecommunications Ltd., the Company's newly
formed indirect wholly-owned subsidiary;

                    (iv)  all amounts due and payable under the Investment
Documents on or prior to the date hereof, including without limitation
reimbursement or payment of all out-of-pocket expenses and the amendment fee
required to be reimbursed or paid by the Company pursuant to Section 7 hereof;
and

                    (v)   such other documents, instruments and information as
Allied Capital may reasonably request.

          4.   Representations and Warranties. To induce Allied Capital to
execute and deliver this Fourth Amendment, the Company hereby reaffirms all
covenants, representations, and warranties made in the Investment Agreement and
the other Investment Documents to the extent the same are not amended hereby and
agree that all such covenants, representations, and warranties

Fourth Amendment to Investment Agreement

                                       -2-

<PAGE>

shall be deemed to have been remade as of the date of this Fourth Amendment,
except to the extent that they expressly relate by their terms to a prior date.
Any default by the Company in its warranties and representations made in this
Fourth Amendment shall constitute an additional Event of Default under the
Investment Agreement, as amended hereby.

          5.   Acknowledgments by Company. The Company acknowledges and agrees
with the Holders that as of the date hereof, the aggregate principal amount of
the Obligations owing by the Company to Allied Capital under the Investment
Agreement is $15,000,000, and all such Obligations are due and owing by Company
to Allied Capital without any defense, deduction, offset, or counterclaim of any
nature (all of which are hereby waived).

          6.   Reference to and Effect Upon Investment Agreement. Each reference
in the Investment Agreement to "this Agreement," "hereunder," "hereof," or words
of like import shall hereafter mean and be a reference to the Investment
Agreement, as amended hereby and from time to time. Except as specifically
amended hereby, the Investment Agreement, the other Investment Documents, and
each and every term and provision thereof shall remain in full force and effect
and are hereby ratified and confirmed. The execution, delivery, and
effectiveness of this Fourth Amendment shall not operate as a waiver of any
right, power, or remedy of the Holders under the Investment Agreement or the
other Investment Documents or constitute a waiver of any provision of the
Investment Agreement or the other Investment Documents.

          7.   Fees and Expenses. The Company shall pay all fees and expenses
incurred by Allied Capital in connection with the preparation, negotiation,
execution, and delivery of this Fourth Amendment and any related documents,
including, without limitation, the fees and expenses of its counsel and
out-of-pocket expenses, including reasonable due diligence expenses, on or prior
to the date hereof. The Company shall also pay to Allied Capital a
non-refundable amendment fee in the amount of $75,000.

          8.   Release. The Company acknowledges that Allied Capital has
fulfilled all of its obligations under the Investment Agreement and hereby
releases and forever discharges the Holders and their representatives, agents,
employees, attorneys, successors, directors, officers, parents, affiliates,
assigns, and subsidiaries (collectively the "Releasees") of, to, and from any
and all claims, defenses, actions, causes of action, suits, controversies,
agreements, provisions, and demands in law or in equity, known or unknown
(collectively, the "Claims") which the Company ever had, now has, or may have
arising from or relating to the Investment Documents, against or related to the
Releasees, through the date of this Fourth Amendment. The Company agrees to
assume the risk of any and all unknown, unanticipated or misunderstood claims
which are released hereby.

Fourth Amendment to Investment Agreement

                                       -3-

<PAGE>

          9.   Miscellaneous.

               (a)  Entire Agreement; Integration Clause. This Fourth Amendment
and the other Investment Documents set forth the entire agreements and
understandings of the parties hereto with respect to this transaction, and as
such supersede any prior agreements, whether written or oral, regarding the
matters described herein.

               (b)  No Oral Modification or Waivers. The terms herein may not be
modified or waived orally, but only by an instrument in writing signed by the
party against which enforcement of the modification or waiver (as the case may
be) is sought.

               (c)  Governing Law. This Fourth Amendment is governed by, and
interpreted and construed in accordance with, the internal laws of the State of
Maryland (without regard to its conflicts of law principles).

               (d)  Headings. The headings of the paragraphs and sub-paragraphs
of this Fourth Amendment are inserted for convenience only and shall not be
deemed to constitute a part of this Fourth Amendment or the other Investment
Documents.

               (e)  Severability. To the extent any provision herein violates
any applicable law, that provision shall be considered void and the balance of
this Fourth Amendment shall remain unchanged and in full force and effect.

               (f)  Counterparts. This Fourth Amendment may be executed in as
many counterpart copies as may be required. It shall not be necessary that the
signature of, or on behalf of, each party appear on each counterpart, but it
shall be sufficient that the signature of, or on behalf of, each party appear on
one or more of the counterparts. All counterparts shall collectively constitute
a single agreement. It shall not be necessary in any proof of this Fourth
Amendment to produce or account for more than a number of counterparts
containing the respective signatures of, or on behalf of, all of the parties.

                      [Signatures appear on following page]

Fourth Amendment to Investment Agreement

                                       -4-

<PAGE>

     IN WITNESS WHEREOF, the undersigned have executed and delivered this Fourth
Amendment as of the date first above written.

                                    COMPANY:

WITNESS/ATTEST:                         OPINION RESEARCH CORPORATION

  /s/ Loretta M. Nelson                 By: /s/ Kevin P. Croke            (SEAL)
--------------------------                 ------------------------------
Name: Loretta M. Nelson                 Name:  Kevin P. Croke
                                        Title: EVP & Director of Finance

                                        ALLIED CAPITAL:

WITNESS/ATTEST:                         ALLIED CAPITAL CORPORATION

                                        By: /s/ Daniel L. Russell         (SEAL)
--------------------------                 ------------------------------
Name:                                   Name:  Daniel L. Russell
                                        Title: Principal

WITNESS/ATTEST:                         ALLIED INVESTMENT CORPORATION

                                        By: /s/ Daniel L. Russell         (SEAL)
--------------------------                 ------------------------------
Name:                                   Name:  Daniel L. Russell
                                        Title: Principal

                                Signature Page to
                    Fourth Amendment to Investment Agreement<PAGE>

                                                                   Exhibit 10.32

                               SECOND AMENDMENT TO
                              INVESTMENT AGREEMENT

     THIS SECOND AMENDMENT TO INVESTMENT AGREEMENT (this "Second Amendment") is
made as of March 19, 2002 by and between OPINION RESEARCH CORPORATION, a
Delaware corporation (the "Company") and ALLIED CAPITAL CORPORATION and ALLIED
INVESTMENT CORPORATION, each a Maryland corporation (collectively referred to
herein as "Allied Capital").

                                    RECITALS:

     A.   Allied Capital invested the aggregate sum of Fifteen Million Dollars
($15,000,000) in the Company, in exchange for certain subordinated debentures of
the Company and Warrants to purchase shares of Common Stock of the Company
pursuant to that certain Investment Agreement dated as of May 26, 1999 by and
between the Company and Allied Capital (as amended, the "Investment Agreement").

     B.   The parties desire to modify certain provisions of the Investment
Agreement.

          NOW, THEREFORE, in consideration of the foregoing Recitals and the
mutual covenants contained herein, and other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, Allied Capital and
its successors and assigns with respect to any of the Debentures or any of the
Warrants (as those terms are hereinafter defined) (individually, a "Holder" and
collectively, the "Holders") and the Company hereby agree as follows:

          1.   Definitions. All capitalized terms used herein without definition
shall have the meanings given to such terms in the Investment Agreement.

          2.   Amendments to Investment Agreement. The following amendments to
the Investment Agreement shall take effect as of the date hereof:

               (a)   Section 5.13 of the Investment Agreement is hereby deleted
in its entirety and amended and restated as follows:

                     "(a)    Indebtedness to Adjusted EBITDA Ratio. Prior to the
Maturity Date, the Company shall maintain the following maximum ratio of
Indebtedness as of the last day of such calendar quarter to Adjusted EBITDA for
the 12 month period ending on such day, commencing with the calendar quarter
ending September 30, 1999:

<PAGE>

                          Period                                    Ratio
          ---------------------------------------------            --------
          September 30, 1999 through September 30, 2000            4.50 : 1
          December 31, 2000 through September 30, 2001             4.25 : 1
          December 31, 2001                                        4.00 : 1
          March 31, 2002                                           4.30 : 1
          June 30, 2002                                            4.25 : 1
          September 30, 2002                                       4.00 : 1
          December 31, 2002 and thereafter                         3.75 : 1

In the calculation of Indebtedness for the Indebtedness to Adjusted EBITDA
ratio, the Senior Revolver Debt portion of the Company's Indebtedness shall be
deemed to be the average daily principal balance of the Senior Revolver Debt for
the final one month period of the applicable 12 month period."

               (b)   Section 5.13(b) of the Investment Agreement is hereby
deleted in its entirety and amended and restated as follows:

                     "(b)    EBITDA to Principal and Interest Ratio. Prior to
the Maturity Date, the Company shall maintain the following minimum ratios of
EBITDA for the 12 month period ending on the last day of such calendar quarter
to Principal and Interest for the 12 month period ending on the last day of such
calendar quarter commencing with the calendar quarter ending September 30, 1999:

                          Period                                    Ratio
          ---------------------------------------------            --------
          1999                                                     1.30 : 1
          2000                                                     1.50 : 1
          2001                                                     1.60 : 1
          March 31, 2002                                           1.30 : 1
          June 30, 2002                                            1.30 : 1
          September 30, 2002                                       1.30 : 1
          December 31, 2002                                        1.50 : 1
          March 31, 2003 and thereafter                            1.60 : 1

As used in this financial covenant, "Principal and Interest" means all scheduled
payments during the applicable period of principal and cash interest obligations
on the Company's Indebtedness."

          3.   Closing Conditions. The obligations of Allied Capital to enter
into this Second Amendment and to perform its obligations hereunder are subject
to the satisfaction of the following conditions on or prior to the date hereof:

               (a)   The representations and warranties set forth herein shall
be true and correct on and as of the date hereof.

Second Amendment to Investment Agreement
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<PAGE>

               (b)   The Company shall be in compliance with all the terms and
provisions set forth herein and in each other Investment Document on its part to
be observed or performed, and at the time of and immediately after the date
hereof, no Event of Default or Default or event or condition that, after the
giving of notice, passage of time, failure to cure or all of the foregoing would
constitute an Event of Default, shall have occurred and be continuing.

               (c)   Allied Capital shall have received the following items:

                     (i)     this Second Amendment, duly executed by the
Company;

                     (ii)    a duly executed copy of the Seventh Amendment to
the Credit Agreement by and between the Company and the Senior Lender modifying
the financial covenants in the Senior Credit Facility and otherwise in form and
substance satisfactory to Allied Capital;

                     (iii)   all amounts due and payable under the Investment
Documents on or prior to the date hereof, including without limitation
reimbursement or payment of all out-of-pocket expenses and the amendment fee
required to be reimbursed or paid by the Company hereunder; and

                     (iv)    such other documents, instruments and information
as Allied Capital may reasonably request.

          4.   Representations and Warranties. To induce Allied Capital to
execute and deliver this Second Amendment, the Company hereby reaffirms all
covenants, representations, and warranties made in the Investment Agreement and
the other Investment Documents to the extent the same are not amended hereby and
agree that all such covenants, representations, and warranties shall be deemed
to have been remade as of the date of this Second Amendment, except to the
extent that they expressly relate by their terms to a prior date. Any default by
the Company in its warranties and representations made in this Second Amendment
shall constitute an additional Event of Default under the Investment Agreement,
as amended hereby.

          5.   Acknowledgments by Company. The Company acknowledges and agrees
with the Holders that as of the date hereof, the aggregate principal amount of
the Obligations owing by the Company to Allied Capital under the Investment
Agreement is $15,000,000, and all such Obligations are due and owing by Company
to Allied Capital without any defense, deduction, offset, or counterclaim of any
nature (all of which are hereby waived).

          6.   Reference to and Effect Upon Investment Agreement. Each reference
in the Investment Agreement to "this Agreement," "hereunder," "hereof," or words
of like import shall hereafter mean and be a reference to the Investment
Agreement, as amended hereby and from time to time. Except as specifically
amended hereby, the Investment Agreement, the other Investment Documents, and
each and every term and provision thereof shall remain in full force and effect
and are hereby ratified and confirmed. The execution, delivery, and
effectiveness of this Second Amendment shall not operate as a waiver of any
right, power, or remedy of the Holders under the

Second Amendment to Investment Agreement
3622742
17295-47

                                      - 3 -

<PAGE>

Investment Agreement or the other Investment Documents or constitute a waiver of
any provision of the Investment Agreement or the other Investment Documents.

          7.   Fees and Expenses. The Company shall pay all fees and expenses
incurred by Allied Capital in connection with the preparation, negotiation,
execution, and delivery of this Second Amendment and any related documents,
including, without limitation, the fees and expenses of its counsel and
out-of-pocket expenses, including reasonable due diligence expenses, on or prior
to the date hereof. The Company shall also pay to Allied Capital a
non-refundable amendment fee in the amount of $37,500.

          8.   Release. The Company acknowledges that Allied Capital has
fulfilled all of its obligations under the Investment Agreement and hereby
releases and forever discharges the Holders and their representatives, agents,
employees, attorneys, successors, directors, officers, parents, affiliates,
assigns, and subsidiaries (collectively the "Releasees") of, to, and from any
and all claims, defenses, actions, causes of action, suits, controversies,
agreements, provisions, and demands in law or in equity, known or unknown
(collectively, the "Claims") which the Company ever had, now has, or may have
arising from or relating to the Investment Documents, against or related to the
Releasees, through the date of this Second Amendment. The Company agrees to
assume the risk of any and all unknown, unanticipated or misunderstood claims
which are released hereby.

          9.   Miscellaneous.

               (a)   Entire Agreement; Integration Clause. This Second Amendment
and the other Investment Documents set forth the entire agreements and
understandings of the parties hereto with respect to this transaction, and as
such supersede any prior agreements, whether written or oral, regarding the
matters described herein.

               (b)   No Oral Modification or Waivers. The terms herein may not
be modified or waived orally, but only by an instrument in writing signed by the
party against which enforcement of the modification or waiver (as the case may
be) is sought.

               (c)   Governing Law. This Second Amendment is governed by, and
interpreted and construed in accordance with, the internal laws of the State of
Maryland (without regard to its conflicts of law principles).

               (d)   Headings. The headings of the paragraphs and sub-paragraphs
of this Second Amendment are inserted for convenience only and shall not be
deemed to constitute a part of this Second Amendment or the other Investment
Documents.

               (e)   Severability. To the extent any provision herein violates
any applicable law, that provision shall be considered void and the balance of
this Second Amendment shall remain unchanged and in full force and effect.

               (f)   Counterparts. This Second Amendment may be executed in as
many counterpart copies as may be required. It shall not be necessary that the
signature of, or on behalf

Second Amendment to Investment Agreement
3622742
17295-47

                                      - 4 -

<PAGE>

of, each party appear on each counterpart, but it shall be sufficient that the
signature of, or on behalf of, each party appear on one or more of the
counterparts. All counterparts shall collectively constitute a single agreement.
It shall not be necessary in any proof of this Second Amendment to produce or
account for more than a number of counterparts containing the respective
signatures of, or on behalf of, all of the parties.

                      [Signatures appear on following page]

Second Amendment to Investment Agreement
3622742
17295-47

                                      - 5 -

<PAGE>

     IN WITNESS WHEREOF, the undersigned have executed and delivered this Second
Amendment as of the date first above written.

                                    COMPANY:

WITNESS/ATTEST:                     OPINION RESEARCH CORPORATION

                                    By: /s/ Kevin P. Croke          (SEAL)
---------------------------             ----------------------------
Name:                               Name:  Kevin P. Croke
                                    Title: EVP & Director of Finance

                                    ALLIED CAPITAL:

WITNESS/ATTEST:                     ALLIED CAPITAL CORPORATION

                                    By: /s/ Thomas H. Westbrook  (SEAL)
---------------------------             -------------------------
Name:                               Name:  Thomas H. Westbrook
                                    Title: Managing Director

WITNESS/ATTEST:                     ALLIED INVESTMENT CORPORATION

                                    By: /s/ Thomas H. Westbrook  (SEAL)
---------------------------             -------------------------
Name:                               Name:  Thomas H. Westbrook
                                    Title: Managing Director

Second Amendment to Investment Agreement
3622742
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                                      - 6 -

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