3D CAD Mechanical Drawings for Plumbing

I'm seeking a skilled 3D CAD designer to create detailed mechanical drawings for a 4-story apartment building atop a concrete parking garage. The project involves comprehensive plumbing coordination for multiple systems.

Requirements:
- Layout and coordination drawings for:
- Water Supply
- Drainage
- Gas Supply
- Storm Water
- Separate Kitchen Waste Line

Ideal Skills and Experience:
- Proficiency in 3D CAD software
- Experience with plumbing system layouts
- Knowledge of multi-story building requirements
- Attention to detail and accuracy
- Ability to collaborate with other trades

Please provide samples of relevant work and a brief outline of your approach.