John “Jack” T. Sinnott, vice chairman, office of the chief executive officer, plans to retire, effective Dec. 31, according to the New York-based professional services company Marsh & McLennan Companies Inc.

Mr. Sinnott joined MMC's predecessor company, Marsh & McLennan Inc., in 1963, and held various executive positions with the company including vice chairman and CEO of J&H Marsh & McLennan Inc. and president and chief executive office of Marsh & McLennan Inc.

Mr. Sinnott has held his current position since July 1, 2005, when he re-joined MMC after a period of retirement.

He was a director of Marsh Inc. from June 2005 through December 2005; chairman and CEO of insurance broker Marsh, a division of MMC, from 1999 to 2002; and chairman of Marsh until his retirement in 2003.

Mr. Sinnott was a member of the MMC board of directors from 1992 through May 2003.

“Three-and-a-half years after his originally planned retirement and after more than 43 years of service to Marsh & McLennan, Jack Sinnott has decided to 're-retire' at the end of this year,” said Michael Cherkasky, president and CEO of MMC, in a statement.

“Jack clearly is not one to let any dust settle under him and intends to remain active by reinstating some long awaited plans with his wife, Eileen, and continuing to serve as a trustee/director on five not-for-profit boards and one public company board,” Mr. Cherkasky said. “We thank him for his loyalty and exceptional service to the firm over so many years and wish him and Eileen good health and much happiness in the future.”

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