WordPress Multisite Setup

I need an expert to create a WordPress multisite network for managing multiple company/brand websites. Each site should have its own unique design and features, and each will operate under its own domain name.

Key Requirements:
- Set up a WordPress multisite network
- Configure each site to use its own domain name
- Ensure each site can have its own design and features

Ideal Skills and Experience:
- Proven experience with WordPress multisite
- Strong knowledge of domain mapping
- Expertise in WordPress theme and plugin customization
- Familiarity with server management and DNS settings

Please provide examples of similar work done.