The San Diego County Sheriff's Department Auxiliary Communications Service is made up of specially trained communications volunteers managed by the Communications Center. These volunteers help provide support when there is a need for supplemental communications during planned events and emergencies.

Using Amateur Radio, public safety radio networks, and other communications systems, ACS volunteers are prepared to provide emergency auxiliary radio communications during disasters such as earthquakes, floods or wildfires. When the San Diego County Emergency Operations Center (EOC) is activated during these types of incidents, ACS provides communication support and works with the County's Office of Emergency Services, the various cities in San Diego County, the American Red Cross, the Amateur Radio Emergency Service (ARES), the State of California Governor's Office of Emergency Services, and many other emergency management and disaster organizations.

ACS is the Radio Amateur Civil Emergency Service (RACES) organization for the San Diego County Operational Area.

To learn more about volunteering for the Auxiliary Communications Service, send an email to acs@sdsheriff.org.