AutoCAD Schematic Drawings Creation

I need a professional to help me convert my existing digital drawings into AutoCAD schematic drawings. The designs could involve various systems and may require a mix of electrical, plumbing, and mechanical schematics.

Key requirements:
- Proficiency in AutoCAD
- Experience working with schematic drawings
- Ability to interpret and work from existing digital files

What I have:
- Existing digital drawings in PDF, JPEG, etc. formats

Please note:
- I have no existing CAD files; only digital ones that need conversion.
- The specific type of schematics (electrical, plumbing, mechanical) will depend on the content of the existing drawings.