Personal Information

Known ForActing

GenderMale

Career Span1990 – Present (37 yrs)

Known Credits11 Titles

Official Links

Official Website IMDb

ActingPopularity Score 0.9

Thomas Philip O'Neill

Total Works

6 movies • 5 shows

Avg Rating

7.3 / 10

across rated releases

Box Office

—

worldwide gross

Global Reach

TMDB star index

Biography

No biography is currently available for Thomas Philip O'Neill.

Signature Roles & Milestones

Top-rated highlights from Thomas Philip O'Neill's career

8.0

Law & Order: Special Victims Unit

1999•series

as Rick Donnelly

6.5

Black Mass

2015•movie

as FBI Wire Tech

8.1

MINDHUNTER

2017•series

as Leo Buchanan

7.9

FBI

2018•series

as Neil Mosbach

Photos & Headshots2

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Full Filmography & Credits

Showing 11 titles featuring Thomas Philip O'Neill

8.0

1 eps

Law & Order: Special Victims Unit

1999•series

as Rick Donnelly

6.5

Black Mass

2015•movie

as FBI Wire Tech

8.1

1 eps

MINDHUNTER

2017•series

as Leo Buchanan

7.9

13 eps

FBI

2018•series

as Neil Mosbach

7.3

2 eps

Law & Order

1990•series

as Dr. Neil Mosbach

7.3

1 eps

NCIS: New Orleans

2014•series

as Eddie Oberman

6.2

Mapplethorpe

2019•movie

as David Croland

The School Duel

2024•movie

as Pastor Mark

Writer's Block

2025•movie

as Matthew

Endless Sea

2022•movie

The Mix

2026•movie

as Sean Palermo