About Robert Clohessy
Born 1958. Robert Clohessy is an American film producer, television actor, film actor and stage actor.
Robert Clohessy (born June 10, 1957) is an American actor. He is best known for playing Correctional Officer Sean Murphy on the HBO prison drama Oz from seasons 3β6, in addition to playing Officer Patrick Flaherty on the NBC police procedural Hill Street Blues, Warden Boss James Neary on the HBO crime drama Boardwalk Empire for the first two seasons and Lieutenant Sid Gormley on the CBS police drama Blue Bloods.
Early life Clohessy was born in the Bronx, New York, the son of John Clohessy, a police officer. He fought in the 1975 Golden Gloves in Madison Square Garden. He graduated from Pearl River High School in Pearl River, New York, and from SUNY Purchase where he studied under Walt Witcover. He later obtained Irish citizenship through his grandparents, who immigrated from County Clare.
He later joined the cast of the HBO prison drama Oz as Correctional Officer Sean Murphy. However, in between these roles, Clohessy had a supporting role as Thomas Smaraldo on NBC's comedy/drama Tattingers (1988β89) and soon after appeared in a starring role on NBC's short-lived comedy One of the Boys (1989). Clohessy co-starred on the Neal Marlens/Carol Black ABC sitcom Laurie Hill in 1992, playing a stay-at-home freelance writer. In 2008, Clohessy had a regular role in the short-lived Fox show New Amsterdam. He won a Screen Actors Guild Award for Best Ensemble in the HBO series Boardwalk Empire.
In feature films, Clohessy played a supporting role in Across the Universe, playing the part of Jude's long-lost father. He played Jack Parker in The Crimson Mask. His largest big budget film role was opposite Ryan Gosling in The Place Beyond the Pines. Onstage, he played Mike in the Broadway Roundabout Theatre Company revival of Pal Joey, from November 2008 through February 2009. He played the bartender in 27 Dresses (2008). From 2010 to the present (2024), he has had a supporting role as Sid Gormley, on the police drama Blue Bloods. In January 2012, he played Jack Healy in Season 1/Episode 13 in Unforgettable. In 2012, he portrayed Sergeant Silva in the film The Avengers.
Filmography
Film
Television
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Important facts
People in Robert Clohessy's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Robert Clohessy's
Frequently asked questions
Who is Robert Clohessy?
American actor
When was Robert Clohessy born?
Robert Clohessy was born on 10 June 1958 in The Bronx.
What is Robert Clohessy's occupation?
Robert Clohessy is a film producer, television actor, film actor and stage actor.
What nationality is Robert Clohessy?
Robert Clohessy is American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Robert Clohessy. https://biography.guide/robert-clohessy/
MLA: "Robert Clohessy." Biography.guide, https://biography.guide/robert-clohessy/.
Chicago: "Robert Clohessy." Biography.guide. https://biography.guide/robert-clohessy/.
Data last updated: 2026-09-22 Β· Spot an error? Report a correction.
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