In 1992, she was hired as a street performer working for the Disney-MGM Studios theme park at Walt Disney World in Orlando, Florida. In 1995, she moved to Hollywood, where she took guest roles in television series such as Roseanne, Home Improvement, Picket Fences, Murphy Brown, ER, Seinfeld, Frasier, Just Shoot Me!, Buffy the Vampire Slayer, Dharma & Greg, Las Vegas and The Drew Carey Show. In a 1997 episode of Frasier, "Roz's Turn", Joosten appeared as Vera, the mother and personal secretary of Frasier's conniving agent, Bebe Glazer, played by Harriet Sansom Harris. The pair would later be reunited to play opposite neighbors in Desperate Housewives.