He has appeared in the films Lean on Me (1989), One False Move (1992), Short Cuts (1993), Waiting to Exhale (1995), A Family Thing (1996), Soul Food (1997), Aquaman (2018), If Beale Street Could Talk (2018), and Saw X (2023).

Beach's big screen debut was in End of the Line in 1987, and he went on to appear opposite Morgan Freeman and Beverly Todd in Lean on Me (1989).

Beach also co-starred in films including Internal Affairs, Cadence (both 1990), One False Move (1992) with Cynda Williams, Short Cuts and True Romance (both 1993).

He was also a regular on the short-lived NBC series Crisis in 2014, and had recurring roles on Stargate Atlantis, Sons of Anarchy, The Client List, The Game, Secrets and Lies, S.W.A.T.

In December 2022, Beach was confirmed by Deadline Hollywood to have signed on to appear in Saw X, the tenth installment of the Saw film series, for release in October 2023.