2D to 3D CAD Conversion

I need 2D sheet metal drawings converted into detailed 3D CAD step files. The drawings are currently in PDF format.

Requirements:
- Full detail in 3D models, including holes and slots
- Accurate dimensioning and representation of existing designs

Ideal skills and experience:
- Proficiency in CAD software
- Experience with sheet metal design
- Attention to detail and accuracy

Please provide samples of similar work.