Einhorn appeared with Kiefer Sutherland in the "Dynamite Cupcakes" television commercial for Acer laptops, and appeared in the sixth and seventh seasons of Mad Men, as copywriter John Mathis. His most recent work includes reprising ’Neil Kellerman’ in the ABC remake of the film, Dirty Dancing and can now be seen on SyFy’s The Magicians where he plays Josh Hoberman.