Ornstein studied acting as a child at the American Academy of Dramatic Arts in New York City, and later studied under Stella Adler. After high school, he enrolled in the Mason Gross School of the Arts. He quit after his first year and moved to New York City to begin working professionally. Ornstein's first film credit was in Crossing Delancey, where he played the minor character "Mickey". Television credits include a recurring role as Detective Bonnaventura on Homicide: Life on the Street, and a two-episode arc on Third Watch, as well as parts in Seinfeld, Law & Order, Law & Order: Special Victims Unit, and Law & Order: Criminal Intent. Ornstein's stage acting credits span twenty-five years worth of new plays in New York City, in addition to creating the role of Louis Ironson in the 1991 World Premiere of Angels in America at the Eureka Theater in San Francisco. Ornstein plays Chuck Marstein on Sons of Anarchy. Michael Ornstein(1963년생, Passaic, New Jersey, USA) 는 배우로, 대표작으로 Man of the Year, Zelos가 있으며, 그 외에도 로 앤 오더, 로 앤 오더: 성범죄전담반, 로 앤 오더: 크리미널 인텐트, NCIS: 로스앤젤레스, 사인필드, 썬즈 오브 아나키, Third Watch, Homicide: Life on the Street, 마얀스 M.C., 버려진 자들, 라스트 세인트, Crossing Delancey 등 다양한 작품에 출연했다. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2026년 '녹턴' - Nocturne에서 Stan 역을 맡았다. 2025년 버려진 자들에서 Issac Marstein 역을 맡았다. 2022년 Mosquito에서 Butcher 역을 맡았다.