Sikora was born in Chicago, Illinois, to mother Barbara and father Albin, one of three boys, and lived in the Jefferson Park and Norwood Park neighborhoods. He is of Polish and Dutch descent. Sikora graduated from Notre Dame College Prep in 1994. He studied acting at Columbia College Chicago, where he earned his MA in theater.

Filmography

• 2024Atypical Pirate
• 2023Fear — Rom
• Power Book IV: Force — Tommy Egan
• Reasonable Doubt — Bill Sterling
• Power Book III: Raising Kanan — Director
• Teenage Euthanasia
• Power Book II: Ghost — Tommy Egan
• 2019The Intruder — Mike
• Maniac — JC
• 2018That's Harassment — Him
• The Shivering Truth — (voice)
• Ozark — Frank Cosgrove Jr.
• The Player — Dominic McCall
• Chicago P.D. — Kevin Bingham
• Power — Tommy Egan
• True Detective — Ginger
• Banshee — Matt Sharp
• 2012Jack Reacher — James Barr
• 2012Safe — Vassily Docheski
• 2012White Alligator — Brad Paul
• Body of Proof — Tom Hanson
• Unforgettable — Robert Harlow
• Blue Bloods — Mark Phelan
• Boardwalk Empire — Hans Schroeder
• 2010Shutter Island — Glen Miga
• 2010Trust — Rob Moscone
• Dollhouse — Terry Karrens
• The Good Wife — Agent Norwich
• White Collar — Jonas Ganz
• 2008Pants on Fire — Wayne
• 2007Charlie Wilson's War — Chess Player
• 2007Night Skies — Joe Sikora
• Criminal Minds — Jimmy Baker
• Grey's Anatomy — Shane Herman
• Lost — Co-Pilot
• 2003Normal — Wayne Applewood
• CSI: Miami — Howard Benchley
• Monk — Boz Harrelson
• Without a Trace — Malcolm Neilus
• 2001Ghost World — Reggae Fan
• 2000The Watcher — Skater
• Law & Order: Special Victims Unit — Jason Gambel
• Third Watch — J.D. Hart
• 1997My Best Friend's Wedding — Stoner Guy #1
• Early Edition — Rick Williams
• ER — Riley
• Dr. Quinn, Medicine Woman — Guard #2
• Frasier — Man in Bar
• Power: Legacy — Tommy Egan, Executive Producer

Appearances as themselves (1)

• Sherri — Self - Guest