Mathieu Streiff is an executive vice president and member of the board of directors of American Healthcare REIT, a diversified healthcare real estate investment trust that owns a portfolio of medical office buildings, skilled nursing facilities and senior housing communities totaling approximately $4.2 billion in gross investment value. He previously served as chief operating officer for American Healthcare REIT, Inc. Prior to that he served as general counsel of Griffin-American Healthcare REIT III and Griffin-American Healthcare REIT IV and was a founder of American Healthcare Investors (“AHI”), the sponsor of both REITs.

American Healthcare REIT was formed in the merger between the two Griffin-American Healthcare REITs and the acquisition of AHI, which was one of the largest privately held healthcare real estate investment firms globally prior to the tri-party transaction that was consummated in October 2021.

Streiff served as general counsel of Griffin-American Healthcare REIT II prior to its $4 billion merger with NorthStar Realty Finance Corp. (NYSE: NRF), now known as DigitalBridge (NYSE: DBRG), in December 2014.

Prior to co-founding American Healthcare Investors in 2012, Streiff served as executive vice president and general counsel of Grubb & Ellis Company, where he oversaw all legal matters for the company, including its investment management and real estate services operations globally.
Previously, Streiff served in the real estate department of Latham & Watkins LLP in New York, where he represented principals, developers and lenders in negotiating and structuring commercial real estate transactions.

Streiff earned a bachelor’s in environmental economics and policy from the University of California, Berkeley and a juris doctorate from Columbia University. He is a member of the New York bar.