Babysitter Needed for my Children - Full-time / Part-time

We are looking for a regular PT summer babysitter for our 12-year-old son. Hours and days can be a little flexible but looking for ideally m-th from 7:30am-12:30 p.m. (or a little later). We need someone comfortable with special needs children as our son is level one ASD (high functioning autistic). Ideal person has a lot of patience, positive attitude and can help with fun activities to keep him busy (trips to museums, the beach, parks, ect.) We both work at home so it's important to keep him engaged with new and interesting things to do. We live in the Horizon Hills area of El Cajon. The job will run through mid-July but we will also need regular babysitting throughout the year after.