Michael O'Neill
Biography
From Wikipedia, the free encyclopedia.
Michael O'Neill (born May 29, 1951) is an American actor. With a career stretching through three decades, he usually portrays senior law enforcement or military officers. He is perhaps best known for his role as Special agent Ron Butterfield, the head of President Josiah Bartlet's Secret Service detail, on The West Wing. He played CTU Administrative Director Richard Walsh in the first two episodes of 24. He played Sgt. Maj. Ron Cheals in the CBS action-drama series The Unit. He starred in the Season Six 2 part Finale of Grey's Anatomy as the broken widower who holds the hospital hostage with a 9mm while pursuing the doctors responsible for unplugging his wife. His most notable film performances occur in Seabiscuit, Secondhand Lions, Transformers, Dancer, Texas Pop 81, Traffic, Sea of Love, A Quiet Little Marriage, Nothing But the Truth, and Green Zone. O'Neill graduated from Auburn University in 1974. After attending Auburn he spent time under the tutelage of actor Will Geer and his daughter, Ellen, at Theatricum Botanicum in Los Angeles before moving to New York to pursue his career there.
Known For
Acting
2007
asTom Banacheck
2010
asColonel Bethel
2003
asGeneral Matheson
1992
asJergens
2023
asJoe Dean
2004
asCowboy
1994
asSpencer Heymen
2008
asBruce
1998
asMr. Lusk
as
2013
asRichard Barkley
1993
asClark Thompson
1989
asMichael
2025
as
1995
asJon Jordan
2014
asDetective Simms
1998
as
2000
asO.B. Keeler
2000
asLawyer Rodman
2008
asCIA Director
1999
asATF Asst. Director Ben Walker
2008
asRalph Christianson
1993
asDick Britton
2003
asRalph
2018
asChaplain Rogers
1996
asAgent Moreland
1992
asSerato
2018
asBeckwith
1981
asChurchill
1989
asRaymond Brown
2019
asChaplain David Kendricks
1992
asSchool Psychologist
1994
asRay Pasquerello
2020
asDell Connelly
2011
asSenator McKellar
2004
asSheriff Smyth
2003
asMr. Pollard
1999
asGreene
2021
asChristian
1995
asDetective Brickman
asArlo
asCommander Bradley
asPatrol Captain Van Gelder
asPhilip Evans
as
asNolan
asTrent Staley
asJonathan McKnight
asRichard Walsh
asRichard Welsh
asAlan Sparks
asCIA Director Keller
asJeb Monroe
asSheriff Buck O'Hara
asNick Ford
asPsychiatrist
asRon Butterfield
asAnthony Franklin
asSheriff Nelson
asGary Clark
asArliss Price
as
asPete Burton
asVictor McCleary
asSenator Roland Foulkes
asSheriff Velchik
asLonnie Mencken
asJoshua Williams
asHerb Stanton
asRet. U.S. Army General Richard Collins
asRiley McCallister
asCol. Ken Kilner
asCongressman Wilcox
asRon Cheals
asRay Brooks
asSenator Mitchell Chapin
asDet. Yarbough
asHarlan Denbo
asJudge Pettigrew
asJudge Roy
asRon Hopkins
asThomas Shannon
asDaniel Edwards (uncredited)
asCarl Luca
asChris Benz
asCameron Collier
asAlonso Mathews
asJim Jackoway
asCounty Prosecutor Calvin Smith
asDr. Bernard Colbert
asDr. Colbert
Production
2002
as
2017
asCrew
Directing
