Corporate Webpage Design for Buyers Advocate

I'm seeking a professional web developer to create a corporate-style webpage for my buyers advocacy service. The primary function of this site is to showcase our negotiation assistance services.

Key requirements include:
- A professional and corporate design aesthetic
- Sections dedicated to detailing our negotiation assistance services
- User-friendly navigation
- Mobile responsiveness

Ideal skills and experience:
- Proven web development portfolio
- Strong design skills with a focus on corporate aesthetics
- Experience in creating service-oriented webpages
- Knowledge of SEO best practices

Please provide samples of similar work.