Talent vet Leonard Hirshan, longtime manager of Clint Eastwood, has been tapped to receive the Seymour Heller Award for Lifetime Achievement in Management.The accolade, to be presented by the Talent Managers Assn. at the 11th annual Heller Awards at the Sheraton Universal on Tuesday, celebrates Hirshan’s 60-plus years in the industry. Getting his start in the New York WMA mailroom in 1951, Hirshan quickly rose through the ranks when he pushed his first client, Eva Marie Saint, to “On the Waterfront,” for which she won a supporting actress Oscar. Hirshan stayed with WME until 2004, moving on to find his own eponymous management firm. Along with Eastwood, Hirshan has counted Edward G. Robinson, Greer Garson, Sammy Davis Jr. and Bruce Beresford among his clients. His other notable accomplishments include negotiating Elvis Presley’s first WMA contract.