STL to Editable STEP File Conversion

I'm looking for a professional who can convert a STL file of a mechanical part to an editable STEP file. The STEP file only needs to represent a basic outline of the original design. However, some minor modifications will be required during the conversion process.

Ideal skills and experience:
- Proficiency in CAD software
- Experience in file format conversion
- Ability to make minor design modifications
- Understanding of mechanical part design
- Attention to detail