Convert Electrical Drawings to Schematics

I need electrical line drawings converted into schematic diagrams.

Requirements:
- Convert from Visio and PDF to schematics
- Create single-line diagrams
- Adhere to IEEE standards
- Schematics to be drawn in Visio
- Prefer US based for ease of communication

Ideal Skills and Experience:
- Proficiency in Visio and PDF conversion
- Experience with electrical schematics
- Knowledge of IEEE standards

Looking for accuracy and attention to detail. Please provide samples of similar work.