Network Security Vulnerability Assessment

I need a skilled professional to perform a comprehensive vulnerability assessment and penetration testing on our network and system infrastructure. The primary objective of this task is to find potential security vulnerabilities.

- Task Details:
Your work will involve identifying weaknesses that could possibly be exploited to undermine our security controls and then testing how effective these controls truly are.

- Approach:
Please prioritize any vulnerabilities found according to threat severity level. I'm looking to focus on the most critical threats before handling the lesser ones.

- Necessary Skills:
Previous experience in network security, vulnerability assessment, and penetration testing is critical. You need to demonstrate a strong understanding of network and system infrastructure, its vulnerabilities, and security control mechanisms.

This task requires a lot of precision, attention to detail, and exceptionally high analytical skills. A cyber-security related certification, like CEH or CISSP, would be a great advantage. You should also be able to communicate effectively, clearly explaining your findings and suggested measures to non-technical team members.