Rabson was born in East Meadow, New York. Jan's voice has been heard on thousands of commercials, films, TV shows and animated films and series. For many years Jan was a member of Johnny Carson's "Mighty Carson Art Players", performing in on-camera sketches as well as providing the voices for answering machines, cash registers and other inanimate objects for Johnny's sketches. Most recently Jan's voice can be heard in all the Pixar "Carstoon" shorts as well as "Toy Story 3", "Up", "Wall-E" and many more. In some of his anime dubbing and on-camera work, he used the name Stanley Gurd, Jr., and is best known for voicing Tetsuo Shima from Akira (the Streamline dub for Orion Pictures) under that name. He is also the voice of video game character Larry Laffer, of Leisure Suit Larry fame and horse from the pre-school series Slim Pig.
- Papa, Director: Episode 42: Animator's Alley/Can't Buy a Thrill/Hollywoodchuck