Marsh McLennan announced that Daniel S. Glaser will retire at year end following a decade leading the company. John Q. Doyle will succeed him as president and chief executive officer, as well as joining the board of directors, effective Jan. 1, 2023.

Glaser has served as president and CEO since 2013. Prior to that, he served as group president and chief operating officer of the company. He rejoined Marsh McLennan in December 2007 as chairman and CEO of Marsh, returning to the firm where he began his career in 1982.

“Dan has had an extraordinary impact on Marsh McLennan, shaping it into a modern, dynamic company,” said H. Edward Hanway, chairman of the company’s board of directors. “He expanded the business into new client segments, increased revenues from $12 billion to over $20 billion and grew the company’s colleague base. He successfully completed the company’s $5.6 billion acquisition of JLT in 2019; launched Marsh McLennan Agency which, in just over a decade, has grown to $2.5 billion of annual revenue and closed 100 acquisitions; and brought the firm together under a shared purpose. We are grateful for his contributions to the enterprise over many years.”

Doyle is an insurance industry veteran with more than 30 years of management experience in commercial insurance underwriting and brokerage. He has served as group president and chief operating officer of Marsh McLennan since January 2022, and prior to that was president and CEO of Marsh, the company’s risk advisory and insurance solutions business, from 2017-2021.

Doyle began his career at AIG and held several executive positions at the insurer, including CEO of AIG Commercial Insurance, and president and CEO of AIG Property and Casualty in the U.S.

Doyle has the full support of the board, Hanway said, noting that “he is a terrific strategist and an exceptional leader who builds effective, diverse and inclusive teams.”