NATIVE ENGLISH NANNY

I am looking for a native English speaking nanny from July 13th until July 31st. I have got 3 children (ages 9 and twins of 5). Job will be from monday through friday from 9:30 until 13:30, tasks would include playing with kids at home, going to the pool (located in the same area), playing in the garden, etc...
We live in Puerta de Hierro (just at the back of Monterreal Hotel) located near Moncloa-Aravaca. Buses 133 or 83 from moncloa takes 15 minutes.
Rates will be arranged based on availivility and cv´s.