Returning to Los Angeles, he took roles in two CBS series to launch his television acting career. He began pursuing a career in theater and eventually moved to New York City, where he was a member of the Impossible Ragtime Theater. After graduating from UCLA, he was selected to apprentice at the Old Globe Theater in San Diego. As a senior, he played leading roles in school productions of Hamlet, The Crucible, and The Skin of Our Teeth before graduating in 1967. He attended Santa Monica High School and was active in drama. When he was 15, he moved with his family to Los Angeles, where his mother enrolled him in a drama group in an effort to expand his social circle. Shimerman was born into a Jewish family in Lakewood, New Jersey, on November 5, 1949, the son of accountant Susan and house painter Herbert Shimerman.

Achilles Milo in Justice League Unlimited and Batman: Arkham Underworld Professor, Ace Morgan, The Calculator, The Psycho Pirate, and The Second Red Lantern Guardian in Batman: The Brave and the Bold Raanu in Bionicle: The Legend Reborn Zilius Zox in Justice League Action Raz's Father in Psychonauts Augustus Aquato in Psychonauts 2 The Innkeeper, Abbot Song, and Emperor Sun Hai in Jade Empire The Elder in Death Stranding Andrew Ryan in BioShock various characters on Regular Show and provided additional voices in Mass Effect, Mass Effect 2, Star Wars: The Old Republic, Mass Effect 3, Diablo III, Diablo III: Reaper of Souls, Uncle Grandpa, and We Bare Bears. Shimerman's voice work includes General Skarr and Stomach (alongside various others) in Grim & Evil, Evil Con Carne, and The Grim Adventures of Billy & Mandy Dr. Nefarious in the Ratchet & Clank series, and Judge Brian Hooper in the third season of Boston Legal. He is known for his work as the Ferengi bartender Quark on Star Trek: Deep Space Nine, Principal Snyder on Buffy the Vampire Slayer, Dr. He is sometimes credited as Arman Shimmerman or Armin Shimmerman. Armin Shimerman (born November 5, 1949) is an American actor and author.

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