Thomas M. Countryman

Tom Countryman
Under Secretary of State for International Security Affairs
Acting
In office
October 12, 2016  January 27, 2017
PresidentBarack Obama
Donald Trump
Preceded byRose Gottemoeller
Succeeded byAndrea L. Thompson (2018)
2nd Assistant Secretary of State for International Security and Nonproliferation
In office
September 27, 2011  January 27, 2017
PresidentBarack Obama
Donald Trump
Preceded byJohn Rood
Succeeded byChristopher Ashley Ford
Personal details
Born1957 (age 6768)
EducationWashington University in St. Louis (BA)
Harvard University

Thomas M. Countryman (born 1957) is a career diplomat who served as United States Assistant Secretary of State for International Security and Nonproliferation from September 27, 2011 to January 27, 2017.