Operations Staff

A diverse group of individuals poses together outside a building, wearing uniforms and caps, smiling for the camera.

Operation staff consist of ten Vector Control Technicians, a Supervisor, and a Director. All staff are certified by the California Department of State Health Services as Public Health Vector Control Technicians. All staff maintain an active certification, which includes continuing education units and regular training.

Casey Stevenson

Position: Operations Director
Phone: 650-344-8592

Casey began his career with San Mateo Mosquito and Vector Control District in 2008 as a seasonal Vector Control Aide. Later that year he was hired as…

Ryan Thorndike

Position: Field Operations Supervisor

Ryan Thorndike started with the District in 2014 as a seasonal employee helping to eradicate the Aedes aegypti mosquito (also known as the Yellow…

Stephanie Busam

Stephanie is the primary technician for Brisbane, South San Francisco, Millbrae, and San Bruno.

Walter Bruj

Walter is the primary technician for Redwood City and part of Menlo Park.

Eric Eckstein

Eric is the primary technician for Atherton, East Palo Alto, and part of Menlo Park.

Louis Fernandez

Louis is the District's Facilities Maintenance Coordinator and is the primary technician for Burlingame and part of Hillsborough.

Vanessa Hernandez Pacheco

Vanessa is the primary technician for Woodside, Portola Valley, La Honda, and surrounding areas.

Sean Jones

Sean is the District's mechanic, a UAS pilot, and also a certified vector control technician.

Kim Keyser

Kim is the primary technician for Foster City and part of San Mateo.

Justin Loman

Justin is the primary technician for part of San Mateo and part of Hillsborough.

Devon MacDonald

Devon is the primary technician for Belmont, Redwood Shores, and San Carlos.

Evan Ostermann

Evan is the primary technician for Daly City, Half Moon Bay, Pacifica, and unincorporated coastside areas.

Sign up for updates from San Mateo County Mosquito and Vector Control District