Terrence Leo O'Brien (born August 8, 1943) is a Senior United States circuit judge of the United States Court of Appeals for the Tenth Circuit.

Career output and lasting influence
Opinions attributed per year · peak 4/year
Later decisions citing those opinions, per year · peak 72/year
Tenth Circuit Court of Appeals · 2002–2013
Both charts share the same year axis. Opinion counts include only opinions in our corpus attributed to this judge so far — a year at zero can mean an attribution gap, not judicial silence. Influence typically outlasts the career: citations keep climbing after the last opinion.
- Gender
- Male
- Race
- White
Prior employment
- Private practice, Wyoming1974–1980, 2001–2002
- Visionary Communications, Inc.President · 2000–2001
Judge · 1980–2000
Appellate Section, Land and Natural Resources Division, U.S. Department of JusticeStaff attorney · 1972–1974
Ordnance CorpsU.S. Army · 1966–1969
Appointments
2002–2013 · Appointed by George W. Bush (Republican)
Education
J.D. · 1972- University of WyomingB.S. · 1965