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

We are looking for a great babysitter for 3 children in Westford. We would prefer someone who could help out with light housekeeping and homework help. We would prefer a babysitter who has their own car, who does not smoke, who is comfortable with pets and who is CPR certified. This would be regular wkly through the school year with possible added hours on other days.