Classic Branded PDF Invoice Design

I need a professional PDF invoice designed for my negotiation services. The design should be classic and formal.

Requirements:
- Must include:
- Company logo and contact details
- Client details and services provided
- Payment terms and due date
- Use of my specific brand colors

Ideal Skills and Experience:
- Graphic design experience, particularly with PDF documents
- Strong understanding of formal design aesthetics
- Ability to incorporate specific brand colors seamlessly

Please provide samples of previous work.