
Acting
An American actor. He is known for playing character roles in major studio films such as There Will Be Blood, The Mummy, Clive Barker’s Lord of Illusions, F/X2 and Van Helsing. He is a favorite of writer/director Stephen Sommers, who usually casts him in his films.
Description above from the Wikipedia article Kevin J. O'Connor (actor), licensed under CC-BY-SA, full list of contributors on Wikipedia.

Robert Frank in Conversation with Clark Winter: 10 Films

Wish Upon a Unicorn
as Willie

Captive State
as Kermode

Colewell
as Charles

Buck Run
as John Yoder

Exorcism at 60,000 Feet
as Buzz

Mile 22
as CIA Case Officer (uncredited)

Widows
as Bobby Welsh

The Cleanse
as Fredericks

Blame it on Toby
as Arthur Prentiss-Wilcox

Catch-22
as Lt. Col. Korn · 6 ep.

On Becoming a God in Central Florida
as Roger Penland · 6 ep.

11.22.63
as Yellow Card Man · 7 ep.

Chicago P.D.
as Commander Fischer · 7 ep.

The Blacklist
as Calvin Dawson · 1 ep.

The Beast
as Harry Conrad · 13 ep.

Century City
1 ep.

Law & Order: Criminal Intent
as Evan Chapel · 1 ep.

Gideon's Crossing
as Dr. Michael Pirandello · 21 ep.

The Others
as Warren Day · 13 ep.
The Master
2012