Mark O'Brien

Personal Info

Known For Actor

Gender Male

Birthday 1984-05-07 (40 years old)

Place of Birth St. Johns, Newfoundland, Canada

Also Known As Mark O’Brien

Mark O'Brien

Biography

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).

Known For

Actor

Shadow of God

as Mason Harper

Nuremberg

as Col. John Amen

Mum's the Word

as Curtis

Copenhagen

as Cobb

2024
Seven Veils

as Paul

2022
61st Street

as Officer Logan

2021
Blue Bayou

as Ace

2021
The Righteous

as Aaron Smith

2020
Your Honor

as Father Jay

2020
Perry Mason

as Thomas Milligan

2019
Hammer

as Chris Davis

2019
Marriage Story

as Carter Mitchum

2019
Ready or Not

as Alex Le Domas

2019
Goalie

as Terry Sawchuk

2019
2019
City on a Hill

as Jimmy Ryan

2018
The Front Runner

as Billy Shore

2018
2018
Kin

as Jake

2018
The Darkest Minds

as Rob Meadows

2018
How It Ends

as Jeremiah

2018
Anon

as Cyrus Frear

2018
Parallel

as Josh

2017
The Last Tycoon

as Max Miner

2016
Arrival

as Captain Marks

2016
2015
2015
Dennis

as Dennis

2015
Killjoys

as Grayson Hicks

2014
Halt and Catch Fire

as Tom Rendon

2013
Hannibal

as Randall Tier

2012
Beat Down

as Michael

2010
Snarbuckled

as Jacob O'Higgins

2010
Brad

as Brad

2010
Republic of Doyle

as Des Courtney

2009
Cut from the Same Cloth

as Jack Cochrane

2009
Warehouse 13

as Jerry Hoffler

2008
Epilogue

as Henry

2008
The Four Horsemen

as Eric Rollins

Director

2021
The Righteous

as Director

2016
Wanderer

as Director

2011
Kathy

as Director

Producer

2021
The Righteous

as Executive Producer

2019
Goalie

as Executive Producer

2015
Dennis

as Producer

2010
Brad

as Producer

Writer

2021
The Righteous

as Writer

Editor

2010
Brad

as Editor