Jack Rosevear is an experienced fire-fighting professional who serves the Two Rock Volunteer Fire Department in Petaluma, California, as a volunteer fire captain. In this position, he is responsible for fire-suppression activities and emergency medical-care response throughout the Petaluma and Bloomfield areas. In 2017, Jack Rosevear was named the Two Rock Volunteer Firefighter of the Year. Prior to his role at Two Rock Volunteer Fire Department, he spent time as the fire commander and fire chief with the Rohnert Park Department of Public Safety. He has held similar leadership positions with the Sonoma County Department of Fire and Emergency Services in Santa Rosa and the Cloverdale Fire Protection District.

Rosevear is a fire technology graduate of Columbia College in Sonora. His extensive career in public service includes five years as a member of the United States Coast Guard Auxiliary. He also leads operations at Jack Rosevear LLC, a Sebastopol-based specialty-trucking and -equipment company that provides fire support and other services throughout the area.