William D. Clarke, Sr. (born 1941) is an American diplomat.
Clarke served as the United States Ambassador to Eritrea from 1998 to 2001.
[1] He previously served over 30 years as a diplomat and member of the Diplomatic Security Service, including becoming the Deputy Assistant Secretary for Countermeasures and Information Security before his ambassadorship.
[2][3] On October 3, 2022, the State Department announced a fellowship enabling a pipeline to become Diplomatic Security Service Special Agent named in Clarke's honor.
[4] This article incorporates public domain material from U.S.