Nanny Needed

My wife and I both work full-time, are finishing up our family bonding leaves and are looking for care for our infant. He is currently 4 months old, so he'll be 6 months old by the time we'll need care. I commute into NYC 2-3 days per week (Tues-Thurs) and my wife works from home. There is no specific care our child needs, just standard infant care (feedings, play time, etc.) that could include occasional babysitting several evenings/weekends per month, as needed.