Roof Retrofit for Octagonal Structure

I need a skilled contractor to reinforce the wooden roof of an octagonal section of an older building in New Hampshire. The area is more than 500 square feet. I want to retrofit the existing roof rather than remove it.

Requirements:
- Use of wood reinforcement for structural enhancement
- Experience in retrofitting roofs, particularly with wooden structures
- Knowledge of local building codes and regulations in New Hampshire
- Assessment and potential redesign of a beam and post placement under the roof to improve functionality in the living space

Ideal Skills and Experience:
- Carpentry and structural engineering expertise
- Previous experience with historical or older building renovations
- Strong attention to detail and quality workmanship

Additional Information:
- Existing engineered plans and photos will be provided for review.
- Timeline: Ideally completed within one week.

Please provide examples of similar work done and a timeline for project completion.