His tailored suit goes with the role, but his modest, soft-spoken demeanor seems out of place when he’s discussing the 100-plus renovations he’s done in Georgetown, the homes he has built in Palm Beach and the Hamptons and the architectural work he has done for Georgetown engineering executive Bill Dean, a.k.a. the “Jay Gatsby of Miami.” (Dean hired Overmyer to design both his Oyster House in Virginia’s Northern Neck and Terra Veritatis, his 11-bedroom Mediterranean-style villa compound in Miami Beach.)