Structural Drawings for Commercial Building

I'm in need of structural drawings for a commercial building that requires modifications to existing architectural plans. The primary construction material for this project will be wood, and the drawings should encompass beams, columns, and footings. Furthermore, I require these drawings to be fully stamped with an architectural seal.

Ideal Skills and Experience:
- Proficient in structural engineering and architectural design
- Extensive experience with commercial building projects
- Able to modify existing architectural plans
- Expert knowledge in wood construction
- Certified architect or engineer for stamping purposes