Mr. Glaser replaces Brian Storms, who was ousted from the top spot at Marsh in September. He currently is managing director of AIG Europe (U.K.) Ltd. and regional president of the U.K. and Ireland division of American International Underwriters, both units of American International Group Inc.
Mr. Glaser, who will also serve as chairman of the brokerage unit, will join Marsh on Dec. 10, the company said in a statement.
Mr. Glaser began his career as a Marsh broker, before moving to Willis Group Holdings Ltd. He joined AIG in 2000.
“Dan has broad expertise in the insurance industry as well as first-hand knowledge of the Marsh organization,” Michael G. Cherkasky, president and CEO of MMC, said in a statement.
“His perspectives as both a broker and an underwriter, coupled with his extensive international experience, make him the ideal candidate to take Marsh forward,” he added.
Mr. Glaser, who currently is based in London, will relocate to New York and report to Mr. Cherkasky.