Schenkenberg is best known for his Calvin Klein advertisements. He has also modelled for Versace, Giorgio Armani,
Marcus Schenkenberg has also appeared mostly as himself in many episodes of different international TV shows, programs and series like V.I.P. (2001), As the World Turns, Stacked (2005), on VH1's fourth season of The Surreal Life or One Life to Live. In Italy these were The Corlucci Cald Show, La Grande Notte del Luned?? Sera, and Never Mind the Buzzcocks (2002) as well as La Talpa (2004), the Italian version of Celebrity Mole.
In 1997, he published a book, Marcus Schenkenberg, New Rules, which featured numerous photos and personal notes and comments on his modelling career, as well as contributions from colleagues, family members and people in the fashion and modeling business.