Nanny Needed For Easygoing Baby

We are looking for full time nanny -- we have 2 kids, a baby (7 months old), who would need full day care and a toddler (3 years old) who is in preschool full time and would need care for a couple hours at the end of the day. Both our kids are easygoing (they eat/sleep well and our toddler is a good listener). We live in Washington, DC (upper NW neighborhood) convenient to public transportation. We guarantee 40 hours per week with paid overtime, paid holidays, vacation, and sick time. We prefer a nanny who does not smoke, is vaccinated, is CPR-certified, and will be paid through a payroll service. Our children have had a nanny who is leaving DC and she is happy to help transition. We'd like someone to start as early as possible.