Raised in Atlanta, Georgia, Joiner attended Georgia Southern University, where he was a successful athlete, cheerleader, and gymnast for four years. He was discovered by a model scout in Atlanta and spent the next several years modelling in Milan, Paris, and South America. He became well-known in the fashion industry very quickly and modelled for Prada, Abercrombie and Fitch, American Eagle, Levi’s, Excedrin and Powerade. Joiner was the official underwear model for Structure from 1998 to 2000. He has appeared on the covers and pages of Vanity Fair, Cosmopolitan, Rolling Stone and Men’s Fitness. Joiner also appeared in RuPaul’s video Looking Good, Feeling Gorgeous. The February 2005 Men’s Fitness cover was his eleventh for the magazine in five years.