Structural Engineer Needed for Woodworking Shop Design

I'm building a 30ft by 40ft woodworking shop made of wood and I need a structural engineer to help design the load-bearing walls and roof structure. The shop should have an open space with minimal internal support structures. The shop is going inside of a large poll barn with an existing concrete floor. I would like the roof of the wood shop to be a loft space I could use as storage. I have some hand drawn sketches to help explain what I as looking for.

Ideal skills and experience for this job include:
- Proficiency in structural engineering, especially with wood
- Experience designing for spacious interiors
- Knowledge of building codes and standards