After graduating, Bosch moved to Toledo, Ohio for a paediatric internship, beginning in 1952. He then returned to Cuba to work as a doctor in Santa Clara Province. His activities included vaccinating children against polio. He also covertly organized for Castro's guerilla war against the Batista government. In 1960, however, less than one-and-a-half years after Castro overthrew Batista, Bosch stopped supporting the Cuban Revolution, and moved to Miami with his wife Myriam, a fellow medical school graduate. They took their four children with them, and soon had another child. The couple divorced ten years later, when Bosch was in prison. Bosch began working for a hospital in Coral Gables, Florida, where he held the position of assistant director.