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.