John O'Brien
John O'Brien's films and television credits on SectorZero.
- Known for
- Acting
Known for
- Grey's Anatomy (2005) — Lab Tech Jeffrey
- Friends (1994) — Airline Employee
- Malcolm in the Middle (2000) — Sales Clerk
- Criminal Minds (2005) — Dr. Meyer
- Two and a Half Men (2003) — Waiter
- The X-Files (1993) — Missionary #2
- Shameless (2011) — Father Monroe
- 9-1-1 (2018) — Rod Billings
- Pretty Little Liars (2010) — Principal Hackett
- Mortdecai (2015) — Butler
- NCIS (2003) — Bruce
- Community (2009) — Chaplin
- Desperate Housewives (2004) — Dr. Wheeler
- Victorious (2010) — Mr. Mooney
- Mad Men (2007) — Phil Kennedy
- S.W.A.T. (2017) — Weber