Seeking framer familiar with exterior rigid insulation in Southeast MI

My wife and I are building a new home in Royal Oak, MI with anticipated May start. Our general contractor is having difficulty finding a framer familiar with the installation of exterior rigid foam. Any referrals would be greatly appreciated.

Our planned wall assembly:
2x6 framing
Plywood
2-3" of polyiso (2 layers with seams staggered)
WRB - tyvek or similar
Furring strips
hardiplank