 He earned a BA in Mass Communications from the University of Minnesota.Raised in New Orleans, Louisiana, O'Sullivan's father Fred (later Efraim) O'Sullivan was a Jewish convert from Catholicism.Before joining "The Jerusalem Post", O'Sullivan worked for seven years as a correspondent for The Associated Press based in Jerusalem and covered the peace processes, the Gulf War in 1991, Palestinian unrest, the Rabin assassination, immigration from Ethiopia, as well as the civil war in Rwanda.