Sullivan was born and raised in the San Francisco, Bay Area. In college, he played basketball and majored in Theater at Brown University, before transferring to the UCLA School of Theater, Film, and Television. Sullivan's breakout came in the 2019 Off-Broadway production of "Slave Play" at New York Theater Workshop. Directed by Robert O'Hara and written by Jeremy O. Harris, "Slave Play" eventually transferred to Broadway and was nominated for 13 Tony awards. Since then, Sullivan has appeared in TV series for Netflix, Hulu, HBO, FX, Amazon and in feature films for A24 and Sony.

Interior Chinatown
Detective Miles Turner · (10 episodes)
2024

Elsbeth
Cameron Clayden · (5 episodes)
2024

Big George Foreman
Muhammad Ali
2023

18½
Barry
2022

The Gilded Age
Thomas Fortune · (11 episodes)
2022

Harlem
Jameson Royce · (12 episodes)
2021

The Surrogate
Aaron
2021

False Positive
Bryon
2021

Wu-Tang: An American Saga
Officer Steven Marcus · (2 episodes)
2019

The Good Fight
Blake Masters · (1 episode)
2017

LOVE: As You Like It
Orlando
2012

Moodswing Whiskey
Mikel

Halston
Ed Austin · (3 episodes)
2021

The Looming Tower
Floyd Bennet · (10 episodes)
2018

Atlanta
Dr. Everette Tillman · (1 episode)
2016

We Bare Bears
Additional Voices (voice) · (1 episode)
2015

The Blacklist
MJ Ward · (1 episode)
2013

Parks and Recreation
Alonzo · (1 episode)
2009