Looking for a Training Partner for Son, Age 12 in Northern Virginia (Chantilly, Fairfax, Reston)

I'm looking for a tennis partner for my son, age 12 between the ages of 9 and 14.   He is an advanced beginner and has been taking private lessons since March.    We are not sure of his NTRP score but may be a 3 to 3.5.    He has good groundstrokes, and volleying and is working on his serve.  

He is very social and easy going.   We are looking for a partner for noncompetitive play (i.e., hitting the ball back and forth to support skill development, leading eventually to learning competitive play and strategy). 

We live in a private development with tennis courts with lights.   Ideally, we would like to find someone close to us in Western Fairfax or Eastern Loudoun counties.   If interested, please respond and I will get back to you. 

Paul