Urgent : Nanny Needed for 2 Children in Ajax

We are looking for a nurturing and responsible nanny to look after 2 children. We would like someone with a few years experience, references, and who lives near Ajax. Our work schedules require our children be picked up from their schools (walking and quick driving distance) in ajax 2 days a week (we don't always know which 2 days, we are mostly work from home but our offices are in Toronto).