Multi-floor Wireless Network Design

I'm in the market for a professional network designer who can help me set up an efficient wireless network that will cater to multiple office floors in my company.

Key Requirements:
- Design, installation, and configuration of a reliable wireless network suitable for internal office connectivity
- Coverage should be dependable across multiple office floors
- High-quality performance and seamless connectivity for all employees
- Prior experience designing and implementing similar network solutions is preferred
- Expertise in wireless network technologies and equipment
- Knowledge of best practices in network security

I am open to hearing your suggestions and solutions to ensure this network is both efficient and effective.