[1] In April 2013, New York University Press published Umoja's book We Will Shoot Back: Armed Resistance in the Mississippi Freedom Movement.

[4] Umoja received his BA in Afro-American studies from California State University, Los Angeles, in June 1986.

[4] After beginning to attend UCLA in 1972, as a freshman, he began to write for the student newspaper NOMMO and also joined the Muhammad Ahmad (Max Stanford) Defense Committee (MADC).

[4] In 1979, Umoja was in a committee of the National Black Human Rights Coalition, which produced a document “detailing the Black liberation movement’s demand for self-determination, reparations and a call to release political prisoners.” It was presented to the Secretary General of the United Nations at that time, who was Salim Salim of Tanzania.

[citation needed] In April 2013, New York University Press published Umoja's first single-authored book, which was titled We Will Shoot Back: Armed Resistance in the Mississippi Freedom Movement.

Umoja was a featured commentator on the American Gangster episode "Dr. Mutulu Shakur", which aired on November 8, 2008.

[citation needed] In recent years, he supported movements [clarification needed] in Guyana and Haiti, and, in August 2010, he led a Black August delegation of the Malcolm X Grassroots Movement to Haiti to investigate conditions after a recent earthquake.