Mr. Mortimer is president and a trustee of The American Assembly, a national, non-partisan, and public affairs forum founded by Dwight D. Eisenhower in 1950 and affiliated with Columbia University. Before joining The American Assembly, he worked at Kuhn-Loeb & Co., an investment bank.
At The Assembly, Mr. Mortimer has overseen more than seventy national projects on domestic and international topics. He has been involved in every aspect of the planning, implementation, and follow-up and has run over eighty regional Assembly programs with institutions throughout the country, Canada, and Europe.
Mr. Mortimer oversees The Assembly's relations with Columbia University, its affiliate and fiscal agent, and has been responsible for the organization's financial stability and institutional health. He oversaw The Assembly's capital campaign and established the major part of its endowment fund. More recently, he has been responsible for many of the Assembly's most successful domestic projects, a number of which have spawned subsequent national programs.
The Assembly's unique publishing arrangement with W. W. Norton & Company for The American Assembly series was negotiated by and is overseen by Mr. Mortimer.
Mr. Mortimer has been actively involved in a variety of private initiatives. He was part of a private delegation that met with the presidents of Hungary, Romania, and the former Yugoslavia to discuss relations between the United States and these countries. He was also invited as part of a delegation by the Chinese government to tour the country and meet with governmental officials.
Mr. Mortimer was appointed commissioner of the Palisades Interstate Park Commission and serves as vice president of the commission. He is the former vice chairman of Scenic Hudson, Inc., and is a director of the Scenic Hudson Land Trust, one of the county's largest land trusts dedicated to preserving open space. He serves as president of the Mary W. Harriman Foundation.
During more than thirty years as a director of the New York City Ballet Company, he has held a variety of board positions before becoming director emeritus. Mr. Mortimer is a member of the Storm King Arts Center Council and serves on the Metropolitan Museum of Art's Visiting Committee of the Department of European Paintings. He has been involved in various capacities with the Whitney Museum, the National Purple Heart Hall of Honor, New York Council for the Humanities, the Economic Club, among other organizations. In addition, Mr. Mortimer is affiliated with several membership organizations, including The Council on Foreign Relations.
Mr. Mortimer holds a BA from the University of Denver. He is married to Shelley Wanger, a senior editor at Pantheon and Alfred A. Knopf.