He was not only an Animator, Simmons also Directed and Wrote. Simmons worked with a few production companies and even co-founded his own studio with fellow animator, Ray Patterson. Simmons’ list of big name companies he has animated for included Walt Disney Studios (where he worked on *Dumbo *and*Fantasia *), Columbia, MGM, and eventually co-founded his own company Grantray-Lawrence in 1954. He worked on “The Marvel Super Heroes” and “Spiderman” series in the 60s and 70. -http://www.agni-animation.com/fullerton/halloffame/Grant_Simmons.html