Sean McCormack is an United States Assistant Secretary of State. He was sworn in as Assistant Secretary for Public Affairs and Department Spokesman on June 2, 2005.

McCormack graduated from Colby College in 1986 with a Bachelor’s degree in economics. He received an M.A. in international relations from the University of Maryland, College Park in 1990

Prior to joining the Foreign Service, McCormack was an analyst at the Meridian Corporation working on issues related to arms control and non-proliferation.