Recurring Sitter Needed For 1 Child In San Diego - Weekday Evenings Only

I am a nurse at the military hospital in Balboa park. When I go to work, I drop my 5-month-old son off at the hospital's daycare. The daycare closes at 6pm, but I don't get out of work until 7pm, so I need a sitter who can pick my son up from daycare around 5:45 p.m. and stay with him on the hospital campus until 7 p.m. It would be 2-3 times per week, different days each week, as my shiftwork schedule varies week by week. Start date would be second week of January until (most likely) the end of April. Ideally you have military base access as well.