Nanny Needed For My Children

We are looking for a great babysitter for 1 child in Philadelphia. We would prefer someone who could help out with light housekeeping. We would prefer a babysitter who has their own car, who does not smoke and who is CPR certified. My schedule varies and I may mainly need a sitter on days my mom or her dad have to work it may be for a few hours until one of them gets off or maybe a full day I work 12 hrs so if a full day itll be from 6am-8p once I get home but thats on a rare occasion