
Acting
From Wikipedia, the free encyclopedia.
Michael O'Neill (born May 29, 1951) is an American actor. With a career stretching through three decades, he usually portrays senior law enforcement or military officers. He is perhaps best known for his role as Special agent Ron Butterfield, the head of President Josiah Bartlet's Secret Service detail, on The West Wing. He played CTU Administrative Director Richard Walsh in the first two episodes of 24. He played Sgt. Maj. Ron Cheals in the CBS action-drama series The Unit. He starred in the Season Six 2 part Finale of Grey's Anatomy as the broken wido…

War of the Worlds
as Secretary of Defense Walter Crystal

Bride Hard
as Frank

Air
as Joe Dean

Cold Call
as Christian

The Stand at Paxton County
as Dell Connelly

Clemency
as Chaplain David Kendricks

Indivisible
as Chaplain Rogers

Danger One
as Beckwith

The Grim Sleeper
as Detective Simms

Dallas Buyers Club
as Richard Barkley

Happy Face
as D.A. Craig Calloway · 5 ep.

Tracker
as Buck Avery · 1 ep.

Happy's Place
as Jim Jackoway · 2 ep.

Fire Country
as Harlan Denbo · 1 ep.

Outer Range
as Judge Pettigrew · 2 ep.

Echoes
as Victor McCleary · 7 ep.

Messiah
as Cameron Collier · 5 ep.

The Resident
as Joshua Williams · 1 ep.

Tom Clancy's Jack Ryan
as Senator Mitchell Chapin · 5 ep.

The Romanoffs
as Ron Hopkins · 1 ep.
NCIS
2003