Liberty Mutual CEO Sweeney Elected Chairman as Long Retires

Liberty Mutual’s Timothy M. Sweeney, president and chief executive officer, has been elected chairman of Liberty Mutual Holding Co.

Sweeney succeeds, David H. Long, who is retiring. Long has been with Boston-based Liberty Mutual for 40 years. He was named president in 2010, CEO in 2011, and chairman in 2013.

Long is credited with growing Liberty Mutual into the sixth-largest global P/C insurer. Key acquisitions during his tenure include State Auto, Ironshore, AmTrust Financial, and AmGeneral.

Sweeney, with the insurer about 30 years, became Liberty Mutual’s 10th CEO in its 110-year history in January 2023 after Long’s retirement as CEO. Long then became executive chairman.

“David’s tenure has been defined by his unwavering commitment to excellence and the well-being of our employees. His leadership has transformed challenges into opportunities, ensuring that our core values remain at the center of everything we do,” said Sweeney.

“Experiencing the evolution of this organization is something I will always cherish,” said Long. “I’d like to express my immense appreciation to our people, as they truly make Liberty Mutual a best place to work, and to the leadership team for their dedication to driving our business forward. I’m eternally grateful for my time with the company and everyone’s unwavering commitment to keep our promises to our customers, partners, communities and each other.”