Just after finishing his bachelor's at the Musicians Institute, Christopher signed on as the new music director for Upright Cabaret, a Los Angeles-based production that revived and reinvented the West Coast cabaret scene. During his tenure as MD, he worked with countless stars of stage, studio, and screen, including Neil Patrick Harris, Billy Porter, Megan Hilty, Adam Lambert, Michael Urie, Shoshana Bean, Eden Espinosa, Caissie Levy, Hunter Parrish, Tracie Thoms, Leslie Odom Jr., and many more.