Structural Calculations & Drawings for Home Extension

I need a professional to create domestic structural calculations and detailed drawings for my home extension project. The extension will be both single-story and double-story, and will serve multiple purposes: additional living space, a home office, and a kitchen/dining area.

Requirements:
- Review and refine my existing detailed plans
- Provide accurate structural calculations
- Create comprehensive, professional-grade drawings

Ideal Skills & Experience:
- Licensed structural engineer
- Extensive experience with residential extensions
- Proficiency in CAD software
- Strong attention to detail and accuracy

Looking forward to your expertise!