Babysitter Needed - Now Hiring

My husband and I work in a school and need someone to stay with our son and drop him off at his school near our job by 8:20am, and to stay with him afterschool from 2:20 p.m. (his dismissal) until 3:45 p.m. (our dismissal). This could entail going to the nearby library and grabbing a snack. We may require other childcare such as for parent teacher conferences (full day until 7pm) and for other events until a similar time in the evening. We have a 2-year-old who may also require childcare for longer days, which come about every 3 months.