Noelia Corzo and Ray Mueller were sworn in January 3, 2023, to the San Mateo County Board of Supervisors. Together, they represent the largest change on the five-member Board in a generation. The last time two new members were sworn in at the same time was 1993. Mueller succeeds Don Horsley as District 3 representative. Corzo succeeds Carole Groom as District 2 representative. Both Horsley and Groom were termed out of office.

Ray Mueller represents District 3, which includes the Coastside. A resident of Menlo Park, Mueller campaigned on a message of addressing challenges such as affordable housing, investment in Coastside infrastructure and environmental stewardship, among other issues. He has pledged to do “impactful work on behalf of San Mateo County District 3, work which will make a difference to our quality of life, our safety, our economy, our environment and our future.” He previously served on the Menlo Park City Council.

The Board of Supervisors oversees a $4 billion annual budget that provides safety net, public safety and other services. The Board also establishes policies that govern the unincorporated areas of the county, including the Midcoast. (MCC is an advisory council to the Board of Supervisors.)

Members of the Board also serve on a number of local and regional boards and commissions.
Supervisor Mueller is assigned to the following:

• Association of Bay Area Governments (ABAG)

• Bay Area Air Quality Management District (BAAQMD)

• Caltrain Joint Powers Board (JPB)

• Coastal Counties Regional Association

• FEMA Emergency Food & Shelter Program Local Board

• San Mateo Health Commission (HPSM)

• Housing Our People Effectively (HOPE) Interagency Council

• Local Agency Formation Commission (LAFCo)

• Nurse‐Family Partnership

• Peninsula Clean Energy (PCE) Board of Directors

• San Mateo County Flood and Sea Level Rise Resiliency District (One Shoreline)

• San Mateo County Transit District (SamTrans) Board of Directors

• San Mateo County Transportation Authority (TA) Board of Directors

• BoS Ad Hoc Committees: Cannabis Policy, Firearm Safety, Fire Resiliency, Portola-Ohlone Trail

• Liaison: Bicycle-Pedestrian Advisory Committee, Farmworker Advisory Commission, Midcoast Community Council (MCC), Pescadero Municipal Advisory Council (PMAC), San Mateo County Agricultural Advisory Council (AAC), San Mateo County Farm Bureau