Flexible Hours - Babysitter Needed

I am looking for a nanny for 1 child in Falls Church. For a total of about 3-4 hours a week. Would prefer a nanny who has their own car, who does not smoke, who is comfortable with pets and who is CPR certified. The hours needed will be short for before and after care for preschool on days I work as I am an RN and do shift work. Will need car as she will need to be picked up and dropped off at preschool.