In 1994, the late ADR director, Kevin Seymour, offered Mary her first try at English ADR script writing on Episode 3 of Giant Robo. Kevin deemed her work a success, thus launching her 23-year career writing dubbing scripts for animation and live action.

Some of Mary’s many credits include Armitage (series and features), Big O, Blackjack (series and feature), Bushido Blade, Castle of Cagliostro, Catnapped, Code Geass, Cowboy Bebop, Devil May Cry, Dot Hack, El Hazard, Ghost in the Shell, Ghost in the Shell:Innocence & Solid State Society, Kekkaishi, Laws of the Universe, Outlaw Star, Resident Evil: Degeneration, Stand Alone Complex (52 episode series), Streetfighter II feature, and Wings of Honneamise