Hans George Klemm (born August 21, 1957) is an American diplomat who served as the United States Ambassador to Romania from September 21, 2015, to December 2019.

Previously he also served as the United States ambassador to East Timor from June 12, 2007, to May 25, 2010.

[1][2] From 2012 to 2015 he was Principal Deputy Assistant Secretary in the State Department's Bureau of Human Resources.

As of January 2015, Klemm served as Senior Advisor to the Under Secretary for Management at the Department of State.

In March 2015 President Barack Obama announced his intent to nominate Klemm as U.S.