Gary Stephen Katzmann (born 1953) is an American lawyer who has served as a United States judge of the United States Court of International Trade since 2016. He previously served as an associate justice of the Massachusetts Appeals Court from 2004 to 2016.

- Gender
- Male
- Race
- White
Prior employment
- NYU Law School Institute of Judicial Administration, New Appellate Judges SeminarFaculty member · 2013–present
- Yale Law SchoolVisiting lecturer on law · 2022
- Massachusetts Appeals CourtAssociate justice · 2004–2016
District of MassachusettsAssistant U.S. attorney · 1983–2004- ↳chief appellate attorney · 1983–1993, 1997–1998
- ↳deputy chief, Criminal Division · 1989
- ↳chief legal counsel to U.S. attorney · 1989–1992
- Washington, D.C.Governance Institute · 1997–2003
- ↳research fellow and project director · 1997–2001
- ↳fellow · 2002–2003
- Harvard UniversityJohn F. Kennedy School of Government · 1997–2003
- ↳research fellow and project director · 1997–2001
- ↳fellow · 2002–2003
Lecturer on law · 1990–1994, 1997
Office of the Director, Federal Bureau of Investigation (on detail)Attorney · 1994–1995
U.S. Department of Justice (on detail)Associate deputy attorney general · 1993–1994- Center for Criminal Justice, Harvard Law SchoolResearch associate · 1981–1983
- ↳special investigator, Administrative Board · 1982–1983
Law clerk , Hon. Stephen G. Breyer · 1980–1981
Law clerk , Hon. Leonard B. Sand · 1979–1980
Appointments
2016–present · Appointed by Barack Obama (Democratic)
2004–present
2004–2016
Education
- Yale School of Organization and ManagementM.P.P.M. · 1979
- Yale Universityjd · 1979
- Yale UniversityPublic Policy & Management · 1979
J.D. · 1979- University of OxfordM.Litt. · 1976
- University of Oxfordma · 1976
- Columbia Collegeba · 1973
- Columbia CollegeA.B. · 1973