Lederer has often worked in the background, privately providing material for other performers and writers. He advised and contributed to animation and film histories by Jerry Beck and others. He wrote sequences performed by comedian Jackie Diamond (Michael Rosenberg) on Fox TV's "Comic Strip Live", and consulted for Marc Price on CBS TV's "The Midnight Hour" As a consultant to Will Ryan, he was a key player in some of the more recent attempts to popularize the animated character Elmo Aardvark.