Comprehensive Network Security Audit - Data Center, Corporate office and Satellite office

I require a highly skilled network security auditor to do an audit of the network infrastructure (including servers and workstations) and undertake a comprehensive examination of my setup, to ensure optimal security measures are in place. Some crucial areas to be focused on include:

- Firewall configuration
- Intrusion detection systems
- Wireless network security
- Complete network including servers, workstations, firewalls, access points, etc.

The ideal freelancer for this project should have vast experience in the specific areas mentioned above. I'm expecting an in-depth report outlining potential vulnerabilities and suggested actions to rectify them.

Credentials are vital to this project's success. Preferably, the freelancer should hold one of the following certifications:

- CISSP (Certified Information Systems Security Professional)
- CISM (Certified Information Security Manager)
- CSIR

Please apply with specific examples of your past and related work experience. Your detail-oriented project proposals would get higher consideration. The mission here is to ensure my network's robustness against potential threats and exploits. Ready to start immediately.