In the early 1970s, Subitzky became a contributing editor at "National Lampoon" magazine, where he worked with many well-regarded humor and comedy creators including Henry Beard, Doug Kenney, Michael O'Donoghue, P. J. O'Rourke, and Michael Gross. Subitzky wrote for, and voice acted with "National Lampoon" comedy performers John Belushi and Chevy Chase in many episodes of the "National Lampoon Radio Hour". He also directed Belushi and Chase on his Lampoon comedy record album, the "Official National Lampoon Stereo Test and Demonstration Record".