He gained extensive emergency medical experience while in the U.S. Army until he retired in 1997. He has worked as a Physician Assistant providing emergency service to critical care patients at Good Samaritan Medical Center and St. Mary’s Medical Center in West Palm Beach. Prior to working at Osceola MediClinic, Lizardi has worked as a Physician Assistant in Emergency Departments at Bartow Regional Hospital, Winter Haven Hospital, Lakeland Regional Hospital and Highland Regional Medical Center.