Loving, Reliable Nanny Needed For 2 Children In Manhattan

We have a very energetic 18-month-old and a sweet 4-month-old. Looking for occasional extra help after daycare and on weekends. Often one parent (usually Dad) will also be home. Looking for help because the two girls together are sometimes a handful :) We have a dog. Grandpa also lives in the house, but in his own basement apartment. Additional needs include light housekeeping, having a reliable car, being comfortable with pets and a non-smoker. Schedule is variable.