Renowned actor O’Neill will soon be seen as “Larry Mills” in the new NBC drama series, Council of Dads, and as “Chaplain Kendricks” in the critically acclaimed feature film, Clemency, which won the Sundance Film Festival Grand Jury Prize. His most recent role is “Senator Mitchell Chapin” in season two of Tom Clancy’s Jack Ryan on Amazon. Other recent appearances for O’Neill include the series’ The Romanoffs, The Resident, 11.22.63, Shooter, S.W.A.T. and a five-episode arc in the final season of Scandal. Previous television credits include his four-season role on the award-winning Sundance TV series, Rectify; the CBS series, Extant with Halle Berry; and A&E’s Bates Motel. O’Neill’s memorable TV roles include Grey’s Anatomy and fan-favorite “Special Agent Ron Butterfield” on The West Wing, as well as Necessary Roughness, Vegas, The Grim Sleeper, NCIS, Sons of Anarchy and The Unit. In feature films, O’Neill played FDA Agent “Richard Barkley” in the award winning Dallas Buyers Club and his vast credits include J. Edgar, Green Zone, Transformers, Secondhand Lions, Traffic, Sea of Love and Seabiscuit. O’Neill also recently completed two feature films, The Stand at Paxton County and Indivisible.

A native of Alabama, O’Neill has a degree in economics from Auburn University. He began his acting career under the mentorship of Will Geer, and his daughter Ellen, at the Theatricum Botanicum in Los Angeles.

He is married to Mary O’Keefe O’Neill and they have three wonderful daughters, Ella, Annie and Molly.

O’Neill has served on the Board of the Hollywood Branch of the Screen Actors Guild and has often participated in the SAG-AFTRA Foundation’s BookPALS program, reading to elementary school children. He has also been involved in Teach for America, Habitat for Humanity and Focus on Recovery in Birmingham.