Greer began acting in stage productions while a student at the University of Arkansas at Little Rock before being accepted into the Professional Workshop at the Circle in the Square Theatre in New York City, where he studied from 1987 to 1989.
[1] His first New York stage appearance was in the off-off Broadway production of Mayberry's Revenge at the Terry Schreiber Theater.
After work in regional theater and years of jobs in warehouses and construction, he began acting in films and television at age 34.
His feature film credits include I Know What You Did Last Summer, The Reaping, The Mechanic, Runaway Jury and Forty Shades of Blue, among others.
In five episodes of season two of the AMC series Turn: Washington's Spies, he portrays Warden Officer Yates.