Justin Hicks Siberell (born 1966)[1] is an American diplomat who served as the United States Ambassador to Bahrain from 2017 to 2020.

[2] Siberell is a career member of the Senior Foreign Service, with the rank of Minister-Counselor.

[2] By 2016 he headed the bureau as Acting Coordinator of Counter Terrorism and, that year, led discussions with Chinese assistant foreign minister Li Huilai on bilateral counter-terrorism cooperation.

[4] On July 27, 2017, Siberell was formally nominated by President Donald Trump as United States Ambassador to Bahrain.

[1] After his retirement from the Foreign Service, Siberell became a lobbyist for the Bechtel corporation, with responsibility for Europe and the Middle East region.