[3] Dean served in the United States Embassy to Georgia as the acting deputy chief of mission and political-economic counselor.
In September 2003, he was appointed the deputy director of the State Department's Office of India, Nepal, Sri Lanka, Maldives and Bhutan Affairs.
[3] In 2011, he served as the chargé d'affaires of the US embassy to Bangladesh based in Dhaka.
[5] Dean served as the special envoy for Holocaust issues under President Barack Obama.
[8][9] He served in the White House as the senior director for South Asia of National Security Staff.