He played Walter on the ABC comedy-drama Ugly Betty and Stuart Bloom on the CBS sitcom The Big Bang Theory.

Starting with the sixth season of The Big Bang Theory, he was promoted to a series regular.

[3][4] He attended the College of Staten Island for one year[4] and went on to graduate from the American Academy of Dramatic Arts in Manhattan.

[5][6] Sussman got his start in commercials, playing geeks or nerds, like a young Eddie Deezen during the dot-com boom for companies such as FedEx.

In 2011 and 2012, he worked with The Big Bang Theory co-star John Ross Bowie to create two television comedies: The Ever After Part (FOX) and The Second Coming of Rob (CBS).