A 30-year professional of insurance policy and regulations, Auth founded a small business in 1985 as an insurance broker. Previously, he was the agency manager at the Motor Vehicle Commission office in North Bergen and a school teacher for the North Bergen School District from 2004 to 2006. He earned a bachelor's degree in history and philosophy from New York University in 2001.

Auth and his wife have one grown son and reside in Old Tappan.