After taking a improvisation and scene study classes, Mutakabbir began to land minor roles. His first break came when he landed the lead in Keri Hilson's Turnin Me On music video and later landing a minor role in Tyler Perry's House of Payne and I Can Do Bad By Myself. After moving to LA in order to further pursue his acting career, he landed several small roles in Entourage, Iron Man 3, and The Bold and the Beautiful.In 2012 he landed the role of Woody in the Cinemax series Zane's The Jump Off, which follows the lives of five successful African American men from all sorts of backgrounds as it tells the stories of their everyday lives. The series premiered March 29, 2013 and ran for a whole season. Mutakabbir described Woody as a "loyal character" who "still has his own growing up to do".Mutakabbir was also as the lead in Ben Ramsey's Black Salt, a live-action mini feature based on the eponymous critically acclaimed comic book franchise. This project was a winner in the 2015 Urban Action Showcase and as a result will be slated to air on HBO/Cinemax Spring 2016.Mutakabbir's latest project Slammed! has in the leading role once again where he plays flamboyant "rap king" Sam Mitchell. Kinyumba relishes in this role as he has also contributed to music on the film. In addition to acting, Mutakabbir owns a production company and is already working on his production Hell Bent, where he stars as special agent Damien Travers.In his free time, Mutakabbir enjoys mentoring, working closely with the non-profit organization The Fulfillment Fund.