Michael O'Neill
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
Actor
as Jim Jackoway
as Joe Dean
as Harlan Denbo
as Victor McCleary
as Judge Pettigrew
as Christian
as Dell Connelly
as Cameron Collier
as Chaplain David Kendricks
as Chaplain Rogers
as Beckwith
as Ron Hopkins
as Senator Mitchell Chapin
as Joshua Williams
as Carl Luca
as Ray Brooks
as Arlo
as Arliss Price
as Detective Simms
as Psychiatrist
as Alan Sparks
as Richard Barkley
as Senator Roland Foulkes
as Nick Ford
as Lonnie Mencken
as Senator McKellar
as Colonel Bethel
as Jeb Monroe
as Jonathan McKnight
as Trent Staley
as CIA Director Keller
as Ret. U.S. Army General Richard Collins
as CIA Director
as Bruce
as Ralph Christianson
as Judge Roy
as Sheriff Nelson
as Sheriff Velchik
as Anthony Franklin
as Tom Banacheck
as Pete Burton
as Ron Cheals
as Congressman Wilcox
as Nolan
as Det. Yarbough
as Herb Stanton
as Gary Clark
as Cowboy
as Sheriff Smyth
as Alonso Mathews
as Ralph
as Mr. Pollard
as General Matheson
as Riley McCallister
as Thomas Shannon
as Richard Walsh
as Richard Welsh
as Chris Benz
as Lawyer Rodman
as O.B. Keeler
as Asst. A.T.F. Director Ben Walker
as Greene
as Philip Evans
as Ron Butterfield
as Mr. Lusk
as Daniel Edwards (uncredited)
as Agent Moreland
as County Prosecutor Calvin Smith
as Jon Jordan
as Detective Brickman
as Commander Bradley
as Ray Pasquerello
as Spencer Heymen
as Col. Ken Kilner
as Dick Britton
as Clark Thompson
as Sheriff Buck O'Hara
as Patrol Captain Van Gelder
as School Psychologist
as Serato
as Jergens
as Michael
as Raymond Brown
as Churchill
Producer
as Producer
as Co-Producer