GENERAL RELEASE OF ALL CLAIMS

Exhibit 10.5

GENERAL RELEASE OF ALL CLAIMS

1. For valuable consideration set forth on Schedule A hereto, the adequacy of which is hereby acknowledged, the undersigned (“ Executive ”), on his own behalf and on behalf of his heirs, executors, administrators, successors, representatives and assigns, does herein knowingly and voluntarily unconditionally release, waive, and fully discharge Marsh & McLennan Companies, Inc. and its subsidiaries (including successors and assigns thereof) (collectively, the “Company”), and all of their respective past, present and future employees, officers, directors, agents, affiliates, parents, predecessors, administrators, representatives, attorneys, and shareholders, and employee benefit plans, from any and all legal claims, liabilities, suits, causes of action (whether before a court or an administrative agency), damages, costs, attorneys’ fees, interest, injuries, expenses, debts, or demands of any nature whatsoever, known or unknown, liquidated or unliquidated, absolute or contingent, at law or in equity, which were or could have been filed with any Federal, state, or local court, agency, arbitrator or any other entity, based directly or indirectly on Executive’s employment with and separation from Company or based on any other alleged act or omission by or on behalf of Company prior to Executive’s signing this General Release. Without limiting the generality of the foregoing terms, this General Release specifically includes all claims based on the terms, conditions, and privileges of employment, and those based on breach of contract (express or implied), tort, harassment, intentional infliction of emotional distress, defamation, negligence, privacy, employment discrimination, retaliation, discharge not for just cause, constructive discharge, wrongful discharge, the Age Discrimination in Employment Act of 1967, as amended (the “ ADEA ”), the Older Workers Benefit Protection Act of 1990, the Worker Adjustment and Retraining Notification Act, as amended, Executive Order 11,141 (age discrimination), Title VII of the Civil Rights Act of 1964, as amended, the Civil Rights Act of 1991, the Civil Rights Act of 1866 and 1871, Sections 1981 through 1988 of Title 42 of the United States code, as amended, 41 U.S.C. §1981 (discrimination), 29 U.S.C. §206(d)(1) (equal pay), Executive Order 11,246 (race, color, religion, sex and national origin discrimination), the National Labor Relations Act, the Equal Pay Act of 1993, the Americans with Disabilities Act of 1990, the Occupational Safety and Health Act, as amended, the Family Medical Leave Act, the Immigration Reform and Control Act, as amended, the Vietnam Era Veterans Readjustment Assistance Act, §§503-504 of the Rehabilitation Act of 1973 (handicap rehabilitation), the Employee Retirement Income Security Act of 1974, as amended, any federal, state or local fair employment, civil or human rights, wage and hour laws and wage payment laws, and any and all other Federal, state, local or other governmental statutes, laws, ordinances, regulations and orders, under common law, and under any Company policy, procedure, bylaw or rule. This General Release shall not waive or release any rights or claims that Executive may have which arise after the date of this General Release or that arise under or are preserved by Section 3.9, Article 5 and Section 6.8 of the Employment Agreement, effective as of September 25, 2006, by and between Company and the Executive (the “ Employment Agreement ”) and shall not waive post-termination health-continuation insurance benefits required by state or Federal law or the Executive’s rights to be indemnified and/or advanced expenses pursuant to applicable law or the Company or any affiliate’s bylaws or to be covered under any applicable directors’ and officers’ liability insurance policies or the Executive’s rights to enforce the payments and entitlements set forth in Schedule A attached hereto.

2. Executive intends this General Release to be binding on his successors, and Executive specifically agrees not to file or continue any claim in respect of matters covered by Section 1,

above. Executive further agrees never to institute any suit, complaint, proceeding, grievance or action of any kind at law, in equity, or otherwise in any court of the United States or in any state, or in any administrative agency of the United States or any state, county or municipality, or before any other tribunal, public or private, against Company arising from or relating to his employment with or his termination of employment from Company and/or any other occurrences to the date of this General Release, other than a claim challenging the validity of this General Release under the ADEA or respecting any matters not covered by this General Release.

3. Executive is further waiving his right to receive money or other relief in any action instituted by him or on his behalf by any person, entity or governmental agency in respect of matters covered by this General Release. Nothing in this General Release shall limit the rights of any governmental agency or his right of access to, cooperation or participation with any governmental agency, including without limitation, the United States Equal Employment Opportunity Commission. Executive further agrees to waive his rights under any other statute or regulation, state or federal, which provides that a general release does not extend to claims which Executive does not know or suspect to exist in his favor at the time of executing this General Release, which if known to him must have materially affected his settlement with Company.

4. Executive agrees that Executive shall not be eligible and shall not seek or apply for reinstatement or re-employment with Company and agrees that any application for re-employment may be rejected without explanation or liability pursuant to this provision.

5. In further consideration of the promises made by Company in this General Release, Executive specifically waives and releases Company from all claims Executive may have as of the date of this General Release, whether known or unknown, arising under the ADEA. Executive further agrees that:

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6. This General Release does not waive rights or claims that may arise under the ADEA after the date Executive signs this General Release. To the extent barred by the OWBPA, the covenant not to sue contained in Section 2, above, does not apply to claims under the ADEA that challenge the validity of this General Release.

7. To revoke this General Release, Executive must send a written statement of revocation to:

Marsh & McLennan Companies, Inc.

1166 Avenue of the Americas

New York, NY 10036

Attn: Peter Beshar, General Counsel

The revocation must be received no later than 5:00 p.m. on the seventh day following Executive’s execution of this General Release. If Executive does not revoke, the eighth day following Executive’s acceptance will be the “effective date” of this General Release.

8. This General Release shall be governed by the internal laws (and not the choice of laws) of the State of New York, except for the application of pre emptive Federal law.

PLEASE READ THIS AGREEMENT CAREFULLY. IT CONTAINS A RELEASE OF ALL KNOWN AND UNKNOWN CLAIMS.

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SCHEDULE A

This Agreement has been entered into by and between Marsh & McLennan Companies, Inc. (together with its successors and assigns, the “Company”) and Matthew B. Bartley (“you”) with respect to your termination of employment effective as of October 15, 2008 (“your date of termination”).

The Company agrees to pay and/or provide you the following:

1. Cash severance : $4,020,000, representing 200% of the sum of your base salary and average bonus during the period you served as the Chief Financial Officer of the Company as determined in accordance with Section 5.5(d) of the employment agreement between the Company and you dated as of September 25, 2006 (the “Employment Agreement”), paid within thirty (30) days following the “effective date” of the General Release (“Irrevocability Date”), but in no event later than the time necessary for payment of such amounts to qualify as a “short term deferral” for purposes of Section 409A.

2. 2008 Annual bonus : $1,387,500, paid within thirty (30) days following the Irrevocability Date, but in no event later than the time necessary for payment of such amounts to qualify as a “short term deferral” for purposes of Section 409A.

3. Equity-based awards :