Educational support for kids

Hello,
We are a family (Spaniards) moving to France (dpt 78, close to Paris) this summer. We have 3 kids.
We are looking for a person that could be a Couch (in close coordination with the mother) for our kids, specially for the two youngs (4,5 years old twins) with which we are facing some challenges in development.
We would need a person with experience in Ocupation Therapy and/or Sensory integration programs and/or Cognitive development programs. English native speaker as english is the educational language for our kids which attend english school.

We are open to different alternatives. Live in (kind of specialized Au pair), or help after school time and saturdays at home.

We are a very warm and friendly family.