Michael O'Neill (born May 29, 1951) is an American actor.O'Neill was
born and raised in Montgomery, Alabama. He attended Capitol Heights
Junior High and Robert E. Lee High School, graduating in 1969. In high
school he played basketball and was elected class beau and a class
favorite. He graduated from Auburn University in 1974. While at
Auburn, O'Neill was inducted as a brother of Lambda Chi Alpha. After
attending Auburn, he spent time under the tutelage of actor Will Geer
and one of Geer's daughters, the actress Ellen Geer, at Theatricum
Botanicum in Los Angeles before moving to New York to pursue his
career there.With a career stretching through three decades, he
usually portrays senior law enforcement or military officers. He
played Special Agent Ron Butterfield, the head of President Josiah
Bartlet's Secret Service detail, on The West Wing, and CTU
Administrative Director Richard Walsh in the first two episodes of 24.
He played Sgt. Maj. Ron Cheals in CBS' action drama series The Unit.
He starred in the Season 6 two-part finale of Grey's Anatomy as Gary
Clark, the broken widower who holds the hospital hostage with a 9mm
while pursuing the doctors responsible for unplugging his wife's life
support. He portrayed Nick Ford on the second season of Bates Motel,
and Alan Sparks on Extant. 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,
Green Zone, J. Edgar (directed by Clint Eastwood), and Dallas Buyers
Club.
born and raised in Montgomery, Alabama. He attended Capitol Heights
Junior High and Robert E. Lee High School, graduating in 1969. In high
school he played basketball and was elected class beau and a class
favorite. He graduated from Auburn University in 1974. While at
Auburn, O'Neill was inducted as a brother of Lambda Chi Alpha. After
attending Auburn, he spent time under the tutelage of actor Will Geer
and one of Geer's daughters, the actress Ellen Geer, at Theatricum
Botanicum in Los Angeles before moving to New York to pursue his
career there.With a career stretching through three decades, he
usually portrays senior law enforcement or military officers. He
played Special Agent Ron Butterfield, the head of President Josiah
Bartlet's Secret Service detail, on The West Wing, and CTU
Administrative Director Richard Walsh in the first two episodes of 24.
He played Sgt. Maj. Ron Cheals in CBS' action drama series The Unit.
He starred in the Season 6 two-part finale of Grey's Anatomy as Gary
Clark, the broken widower who holds the hospital hostage with a 9mm
while pursuing the doctors responsible for unplugging his wife's life
support. He portrayed Nick Ford on the second season of Bates Motel,
and Alan Sparks on Extant. 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,
Green Zone, J. Edgar (directed by Clint Eastwood), and Dallas Buyers
Club.
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