Mark Lesko

Mark Lesko
Acting United States Assistant Attorney General for the National Security Division
In office
June 21, 2021  November 1, 2021
PresidentJoe Biden
Preceded byJohn Demers
Succeeded byMatthew G. Olsen
Acting United States Attorney for the Eastern District of New York
In office
March 19, 2021  June 21, 2021
PresidentJoe Biden
Preceded bySeth DuCharme (acting)
Succeeded byJacquelyn M. Kasulis (acting)
Personal details
Born (1967-02-04) February 4, 1967
Political partyDemocratic
EducationYale University (BA)
Georgetown University (JD)

Mark J. Lesko (born February 4, 1967) is an American politician and attorney who served as the acting Assistant Attorney General for the National Security Division at the United States Justice Department. Prior to that, from January 20, 2021, he was named as acting United States Attorney for the Eastern District of New York. In addition to his career as a prosecutor in the United States Department of Justice, Lesko served as town supervisor of Brookhaven, New York.