He was a series regular on Fame L.A. and Weeds, and appeared on such shows as Star Trek: Voyager, Star Trek: Deep Space Nine, The West Wing, Six Feet Under, Ugly Betty, Boston Legal, Parks and Recreation, Married... with Children, The Wonder Years, Private Practice, and Criminal Minds.
Milder provided narration for Ballroom Bootcamp, 101 Most Starlicious Make-Overs, Wrecks to Riches, and Lost Gold of World War II.
Starting in 2011, he was a recurring cast member on the Disney Channel sitcom Austin & Ally as Lester Dawson.
He also had an appearance on the show Royal Pains on the USA Network as well as Rizzoli & Isles on TNT.
Milder lives in Manhattan Beach, California, with his wife Betty Lee.