In addition to his role at KKR, Mehlman is a trustee of New York's Mount Sinai Hospital, Franklin & Marshall College, and Teach for America. He is a member of the Council on Foreign Relations, serves as chairman of the American Investment Council (previously the Private Equity Growth Capital Council), and is co-Chairman of the American Enterprise Institute's National Council. He is also a trustee and board member of Sponsors for Educational Opportunity (SEO). Mehlman was appointed to the board of directors of the Sustainability Accounting Standards Board in June, 2016.