He has also been a recurring character in the NBC television series The Blacklist as Matias Solomon, an operative for a covert organization.

Since 2022, Gathegi has played engineer and entrepreneur Dev Ayesa in the Apple TV+ original science fiction space drama series For All Mankind.

[6] In 2007, after guest-starring on Lincoln Heights and Veronica Mars, Gathegi went on to star as Bodie in Death Sentence, Darudi in The Fifth Patient, and Cheese in Gone Baby Gone.

He later portrayed another Haitian character, Jean Baptiste, in the fifth season of Justified, but was unhappy with the role and asked to be written off the show.

[9][10] He has also been a recurring character in NBC's television series, The Blacklist, as Matias Solomon, an operative for a covert organization.