Since 1998, Robert Rosen has been a Managing Member of Greyhawke Capital Advisors LLC, a company which invests capital in, and applies management expertise to, selected investment opportunities generally involving net leased real estate properties. Greyhawke has also sponsored investments in multiple multi-family residential projects. Mr. Rosen was recently made a Director of Nouveau Biosciences, Inc. From 2012 until 2023, Robert Rosen also served as an independent director of KLS Diversified, a hedge fund that specialized in trading multiple debt strategies.

From 1990 through 1998, Mr. Rosen was Chief Executive Officer of Odin Management Company, LP and Newkirk Limited Partnership, two companies, which were formed to manage operations of 175 limited partnerships that owned approximately $5 Billion of commercial real estate properties that were syndicated by Integrated Resources, Inc. Control of these companies and the assets they controlled were sold in 1997 and 1998. Prior to 1990, Mr. Rosen practiced real estate and securities law as a senior partner at Hertzog, Calamari & Gleason and Rosen, Hacker & Nierenberg.

Mr. Rosen is a graduate of Columbia Law School where he was a Harlan Fiske Stone Scholar. He graduated cum laude with departmental honors in political science from the University of Massachusetts, Amherst and was a member of Phi Beta Kappa. Mr. Rosen was an Adjunct Senior Research Scholar for National Security Law at Columbia Law School advising the National Security Law Program. Between September 2014 and December 2019, Mr. Rosen taught a honor’s seminar on “Terrorism, War and Democracy” at the University of Massachusetts, Amherst.

Mr. Rosen was elected as a Director of the Cascade Village Metro District in Vail Colorado in 2024.

Mr. Rosen is a member of Dean’s Council at Columbia Law School and the Advisory Board of the Richman Center at Columbia University for Business, Law and Public Policy. He is also a director of the Blood Cancer United (formerly Leukemia and Lymphoma Society) where he was Chairman of the Finance Committee and is a member of the Therapy Acceleration Program and Investment Committee. He was recently appointed to the Advisory Board of Lawfare, a non-profit multimedia publication dedicated to Hard National Security Choices. He has served as a Director of Inspirica, one of the largest providers of services to the homeless in Connecticut and as a Director of the Partnership for After School Education which promotes and supports quality afterschool programs in New York City.