Agree with PichursParent -- Brian Snyder is one of the best pitching coaches on the East Coast; have known him for 10 years and my son worked with him in his late LL and early HS career. Snyder has a great approach to working with the kids, and his major league pitching experience doesn't hurt either...
He's no longer at the Snyder Baseball facility posted on the link above; he has a new company, Baseball Performance Training, Inc. --
www.baseballpt.com -- in Chantilly, right off Route 50. He's very flexible with scheduling too.
And no, I'm not Brian Snyder -- just someone whose kid worked out with him over the years and who highly recommends him to anyone trying to find a great pitching coach in NoVa.