Monitor, audit, and execute security controls and tools to maintain network security by identifying potential security issues to include performing network security threat/impact assessments and scans, recommending security measures, installing and monitoring security devices, and installing patches, and updates as needed; lead mitigation efforts to remediate discovered security deficiencies. Perform or lead vulnerability assessments, security risk assessments, system audits and penetration testing activities to test and audit existing or proposed systems, networks, functions or software: recommend changes in identified design gaps; and lead remediation or mitigation efforts.