He later moved to New York City where he began appearing in off-Broadway productions.
He won an Obie Award for his critically acclaimed one-man show Sakina's Restaurant.
After studying theatre at the University of South Florida, Mandvi worked as a performer at Disney-MGM Studios at Walt Disney World.
On Broadway, Mandvi appeared as Ali Hakim in the 2002 revival of Oklahoma! He also appeared in the play Homebody/Kabul by Tony Kushner.
He recently portrayed the German chemist Fritz Haber in the off-Broadway play Einstein's Gift.
Following the death of their parents, the Baudelaire orphans are placed under his care, and he proves to be a horrible guardian who is only interested in the fortune left behind by their parents.
After Olaf loses his guardianship over the children, he begins a series of attempts to steal the fortune by wearing various disguises and murdering Gustav Sebald, Montgomery Montgomery, Josephine Anwhistle, and Jacques Snicket, among scores of other related and unrelated victims, as well as attempting to murder Charles and countless others characters.