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Michael O'Neill
1 FOLLOWER • 52 CREDITS • MAY 29, 1947 • 77
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​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.
Overview
​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
ER
NCIS
Diagnosis: Murder
Criminal Minds
JAG
Without a Trace
Ghost Whisperer
Crossing Jordan
NCIS: Los Angeles
Grey's Anatomy
Fringe
The Mentalist
This Is Us
Chicago Hope
24
Shooter
The Unit
Bates Motel
LAX
Sons of Anarchy
Messiah
One West Waikiki
Leverage
Rizzoli & Isles
Outer Range
Prison Break
The Romanoffs
Fire Country
S.W.A.T.
Roswell
Tom Clancy's Jack Ryan
The X-Files
The Resident
Scandal
Rectify
Law & Order: LA
Happy's Place
J. Edgar
11.22.63
Traffic
Air
Dreamcatcher
Transformers
Green Zone
Jennifer Eight
Indivisible
Echoes
Clemency
Dallas Buyers Club
Extant
The West Wing
Production Credits
The Emperor's Club
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