Since 1990, Isham has directed GHVP’s private investments as principal and agent in numerous emerging growth companies in the field of telecommunications, transportation technologies and health-care services.

Before joining GHVP, Isham worked as a consultant to corporate management with The Boston Consulting Group (BCG) and with Strategic Planning Associates (Mercer Consulting acquiree). His responsibilities included development of long-range business strategies for domestic and international markets of Fortune 100 companies. In addition, Isham worked at the American Stock Exchange as a Director under Mr. Arthur Leavitt, the former Chairman of the American Stock Exchange and the Securities and Exchange Commission.

Isham was formerly a Fellow with the U.S. Senate Foreign Relations Committee during the SALT II treaty hearings. He also served on the staff of Congressman James W. Symington of St. Louis, Missouri and Senator Edward Brooke of Massachusetts. In addition, Isham is a trustee of the Institute for War and Peace Reporting (IWPR), headquartered in London.

Isham graduated from Yale University with a bachelor’s degree in International Relations in 1979 and earned an M.B.A. at Harvard Business School in 1983. In addition to his corporate directorships, Isham is the co-founder of the Vienna-based International NeuroTrauma Research Organization, a leading medical organization devoted to conducting research and improving the care of patients with traumatic neurological injuries. He also serves on the Yale Development Board and the Yale University President’s Council for International Activities, as well as the President's Council of the Peconic Land Trust of Southampton, NY.