[2] At SVA, he initially pursued a career producing live action TV, but switched to animation.
[2] After a year-and-a-half, Simon left in order to freelance, recalling in 1975 that, "I was turning out so much work, they had to promote me, because I was earning more money than some of the full-fledged animators.
"[2] Circa 1972, he formed Wantu Animation Inc.,[3] initially based in New York City and then Los Angeles.
[4] Simon's clients included the PBS children's educational series The Electric Company, for which his first short film, "Hey Diddle Diddle", won an award at the International Animated Film Association's 1975 Animation Awards Festival; WNET's children's educational series Vegetable Soup; Sesame Street; the Black Psychiatrists of America; and the New York Public Library.
After not drawing for 10 years, he took up oil painting and had a show at the St. Clair gallery in El Cajon, California, near San Diego, where he was then living.