William H. Moser (born November 1954)[1] is an American diplomat who serves as the Director of the Bureau of Overseas Buildings Operations.

[2] Moser earned a Bachelor of Arts at the University of North Carolina, Chapel Hill and studied at Universitaet zu Koeln in Cologne, Germany.

[3] In 2011, President Barack Obama nominated Moser to be the United States Ambassador to Moldova.

[1] On August 13, 2018, President Trump nominated Moser to be the United States Ambassador to Kazakhstan.

[1] Moser previously served in Kazakhstan in 1996, in the then-Embassy in Almaty as a management officer and then as energy attaché.