A career foreign service official, Pyatt currently serves as the Principal Deputy Assistant Secretary of State for the Bureau of South and Central Asian Affairs.
In this position he played a key role in strengthening of the India-US ties in the first term of the Obama Administration.
From 2007 to 2010, he was Deputy Chief of Mission at the US Mission to the International Atomic Energy Agency and International Organizations in Vienna.
Prior to that, from 2002 to 2007, Pyatt served at the US Embassy in New Delhi, first as Minister Counselor for Political Affairs and then as Deputy Chief of Mission.
In Washington, his assignments included Director for Latin America on the National Security Council staff (1996-1997) and Special Assistant to the Deputy Secretary of State (1995-1996).