I'm not sure if this helps, but I live in Arlington, VA. I had my dad's boat in Lake Anna, VA, and I ended up with
Coastalfiberglassllc@gmail.com in Carrollton, VA (Tidewater area). Craig Bosman is the owner/operator, and he rebuilt my dad's 20CC O/B transom in 2011. He does solid work for a fair price and is a very nice guy to work with.
Where exactly are you? What kind of work do you need done? I may be interested in finding a glas man closer to DC.