
Acting · 41 years old
St. Johns, Newfoundland, Canada
Mark O'Brien (born May 7th, 1984) is a Canadian actor and director. He is best known for playing the role of Des Courtney in Republic of Doyle (2010) and Tom Rendon in Halt and Catch Fire (2014).

Hannibal
Randall Tier

Your Honor
Father Jay

Halt and Catch Fire
Tom Rendon

Marriage Story
Carter Mitchum

Warehouse 13
Jerry Hoffler

Arrival
Captain Marks

Blue Bayou
Ace

Nuremberg
Colonel John Amen

City on a Hill
Jimmy Ryan

Perry Mason
Thomas Milligan

The Sticky
Charlie

Ready or Not
Alex Le Domas

The Last Tycoon
Max Miner

The Darkest Minds
Rob Meadows

Goalie
Terry Sawchuk

Republic of Doyle
Des Courtney

61st Street
Officer Logan

Killjoys
Grayson Hicks

Bad Times at the El Royale
Larsen Rogers

The Kelly Clarkson Show
Self