Supervisor Horsley currently represents the Board of Supervisors on the following Boards and Commissions:

• Airport Community Roundtable (Alternate)
• Coastal Counties Regional Association
• Coastside Community Schools Partnership
• HEART
• HOPE - Housing Our People Effectively Interagency Council
• Local Agency Formation Commission (LAFCo)
• Mid-coast Community Council ( MCC)
• Peninsula Traffic Congestion Relief Alliance (Alternate)
• Pescadero Municipal Advisory Council (PMAC)
• Redwood City 2020 (Alternate)
• San Mateo County Community Action Agency
• San Mateo County Pre-Hospital Emergency Services Providers Group JPA
• Transportation Authority (TA)