3D Model Designer Needed for STEP File Modification

I'm seeking a talented 3D model designer with skills in FreeCAD or Fusion360 to help me with a STEP file. The job primarily involves adding details to the model, specifically, additional mechanical components.

Ideal candidates should have:
- Proficient experience with 3D modeling software, particularly FreeCAD or Fusion360.
- Prior experience in augmenting 3D models with mechanical parts.
- A meticulous eye for detail.

Please include examples of similar projects you've completed in your bid.