In addition to his high-profile role as the “spokesbody” for Calvin Klein, Bergin has walked the runways of New York City, Paris and Milan for Sonia Rykiel, Valentino, Calvin Klein, Gianfranco Ferre, Giorgio Armani, Yves Saint-Laurent and Donna Karan and was the exclusive model for Claiborne for Men, a division of Liz Claiborne, Inc., for over three years. He has also appeared in commercials and print advertisements for Kellogg's, Bacardi Rum, L'Oreal, Maybelline, Coty, Valentino, Perry Ellis, and Liz Claiborne.

Bergin has also branched out into acting. Bergin was a correspondent for the E! Entertainment channel, VH1 Latin America's House of Style, the co-host of MTV exercise show The Daily Burn, and as a recurring character on the short-lived soap opera Central Park West. As a contracted 'star', Michael spent nearly 4 years on Baywatch as the character J.D. Darius and starred as villain "Nick Bozman", on the NBC soap opera Passions. In unusual variety for a model-turned-actor, Bergin worked for art-house legends Merchant Ivory in the 1998 film The Proprietor, played a closeted gay action film star opposite Dean Cain in 2000’s The Broken Hearts Club: A Romantic Comedy, appeared as a stock broker/werewolf in 2002's homoerotic horror movie Wolves of Wall Street, and guest-starred as a rape victim on CBS's popular crime procedural CSI: Miami in 2003