
Acting
Casey Siemaszko (born Kazimierz A. Siemaszko) is a Polish-American actor and the brother of actress Nina Siemaszko. The son of a fighter in the Polish Underground who survived the Sachsenhausen concentration camp, Siemaszko narrated the 1998 feature, The Polish-Americans. Siemaszko was a graduate of the Goodman School of Drama at DePaul University in Chicago, which his sister, Nina Siemaszko later also attended. His acting career consists of smaller roles in dozen of popular films, including Back to the Future, Young Guns, Silence of the Heart, Of Mice and Men, Killing Kennedy, Back to the Fu…
Public Enemies
2009

Killing Kennedy
as Jack Ruby

Public Enemies
as Harry Berman

The Boy Who Cried Bitch: The Adolescent Years

Grand Theft Auto: San Andreas - The Introduction
as Johnny Sindacco (voice) (uncredited)
The Street Lawyer
as Rafter Mayes

The Crew
as Young Bobby Bartellemeo

Limbo
as Bobby Gastineau

Chameleon II: Death Match
as Jake Booker

Together and Alone
as Billy

Bliss
as Tanner

Billions
as Seids · 1 ep.

The Blacklist
as Sam Raimo · 1 ep.

Elementary
as Michael McGee · 1 ep.

NYC 22
as Blume · 1 ep.

Person of Interest
as Lester Strickland · 1 ep.

Unforgettable
as Lt. Greg Sartain · 1 ep.

Blue Bloods
as Josh Thorp · 1 ep.

White Collar
as Bertie Slavkin · 1 ep.

New Amsterdam
as Peter Huygens · 1 ep.

Damages
as Detective Dan Williams · 11 ep.