Gallin joined the mailroom of General Artists Corporation and eventually became a senior vice president and board member.
During this time he played a role in booking The Beatles on The Ed Sullivan Show.
One of his early clients was country music crossover artist Mac Davis, who introduced him to Dolly Parton.
[4] Gallin produced over 20 movies as well as Broadway plays, with Dolly Parton as co-owner of the film and television production company Sandollar Productions, and was the CEO of Mirage Entertainment and Sports.
He was a close associate of Steve Wynn,[1] Barry Diller,[5][6] David Geffen,[5] Diane Von Furstenberg,[7] and Calvin Klein.