JOB SUMMARY: The Assistant District Secretary reports to the Executive Officer, District Secretary and provides administrative support for the Executive Officer, District Secretary, and the Board of Directors for the San Mateo County Transit District (SamTrans), Peninsula Corridor Joint Powers Board (JPB) and the San Mateo County Transportation Authority (TA).   EXAMPLES OF ESSENTIAL FUNCTIONS: Performs and provides detailed administrative support to the Boards and committees. Attends Board and committee meetings and prepares agendas, agenda packets, and minutes. Assists the custodian of records for Board of Directors and committee matters, maintains