CAD Drawing Correction Engineer

I need a skilled CAD specialist to update an existing drawing based on an engineer's comments. The focus will be on structural changes.

Key requirements include:
- Update for structural changes: foundation, pier, concrete wing wall, and steel beam.
- Modify material specifications for steel, concrete, and wood.

Ideal skills and experience:
- Proficiency in CAD software.
- Strong understanding of structural engineering principles.
- Experience with material specifications and construction drawings.

Please provide samples of similar work and an estimated timeline.