Corporate SharePoint Redesign

I'm looking for a SharePoint expert to redesign our existing site with a focus on document management. The site should follow our branding and be easy to navigate.

Key functionalities needed:
- Version control
- Permission management
- Document search and tagging
- Site Specific Departments
- Document Templates

Ideal skills and experience:
- Proficiency in SharePoint design and customisation
- Strong understanding of document management best practice
- Strong understanding of Permission/ Access control
- String understanding of Templates & Document control
- Experience with corporate branding and design principles

Please provide examples of previous work & a rough estimate.