At age 19, Coiro got his first professional gig as an understudy to three roles in the American premiere of
Conor McPherson's off-Broadway play
This Lime Tree Bower directed by
Harris Yulin at
Primary Stages. Within a month of graduating from CMU, Coiro landed the role of Eddie the Bellhop in the
Lincoln Center revival of
George S. Kaufman's
Dinner at Eight, directed by
Gerald Gutierrez. Coiro moved to Los Angeles and portrayed the role of Billy Walsh for six seasons of
Entourage. In 2009, Coiro returned to the stage, starring in a production of
Howard Korder's ''
Boys' Life at Second Stage in New York opposite Jason Biggs. In 2010, Coiro starred in Slamdance winner Snow and Ashes'' and in 2011 appeared alongside
Alexander Skarsard in
Screen Gems' remake of
Straw Dogs. In 2014, Coiro was antagonist to
Stevie Van Zandt's character on the final season of Netflix's first original series, the Norwegian mega-hit
Lillyhammer and he played one of the original Texas Rangers in The History Channel's mini-series
Texas Rising, alongside
Ray Liotta,
Bill Paxton and
Brendan Fraser. During this show he honed his riding and loop roping skills. In 2015, Coiro played Armenian gangster Ari Adamian on the final season of USA's
Graceland. In 2017 and 2018, Coiro appeared as a series regular in
Unsolved and in arcs on
Ray Donovan,
The Walking Dead, and
S.W.A.T. ==Filmography==