(written from a Production point of view)
Born in the Bronx, he went to the University of Chicago where he received a B.A. and moved into an editorial position at DC Comics, working with his brother, Bernard, a member of the business division. He got his start mostly on smaller titles, including "Congo Bill" and "Green Arrow", and had occasional work on issues of "Superman" and "Batman".
"Aquaman", a "back-up" comic strip that he had been in charge of became its own comic, and Kashdan was promoted to a full editor position, eventually launching "Metamorpho" and the "Teen Titans" comics. During this time, he also wrote scripts for various animated shows, including "The Might Hercules" and "The Superman-Aquaman Hour".
As part of a restructuring at DC Comics in 1968, Kashdan was shown the door. He returned to writing full-time, most of the work being done for Western Publishing, including many stories for Gold Key Comics. Books he wrote for included "The Twilight Zone", "Flash Gordon", and "Star Trek".
By the 1980s, his health had started to fail him and his work slowed as he relocated from New York City to Los Angeles.