After school, he worked as a physical education teacher for a time until he accepted a job at his father-in-law's southern New Jersey construction business which was booming thanks to demand from returning World War II veterans. In 1953, he established his own construction company, the Aronow Corporation which quickly became one of the largest construction companies in the state. In 1959, at age of 32, the now-millionaire Aronow moved to Miami with his family, where he began racing boats as a hobby.