It Security Network Administrator; On-Site

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Under the general direction of the IT Manager the IT Security Network Administrator is responsible for the administration, security, monitoring, maintenance, and optimization of the organization's network and network-security infrastructure. This position combines traditional network administration responsibilities with a strong emphasis on cybersecurity, network access controls, firewall administration, network segmentation, threat monitoring, vulnerability remediation, and secure infrastructure operations.

The position works closely with IT leadership, systems administrators, cybersecurity personnel, vendors, and business stakeholders to maintain a secure, reliable, and resilient network infrastructure.

The IT Security Network Administrator will be expected to operate proactively, identify security and infrastructure risks, investigate abnormal network activity, implement appropriate controls, and maintain accurate documentation of network and security configurations.

• Administer and maintain LAN, WAN, wireless, VPN, Internet, and related network infrastructure.
• Configure and maintain switches, routers, firewalls, wireless infrastructure, VPN systems, and network-management platforms.
• Administer VLANs, routing, switching, DNS, DHCP, IP addressing, and related network services.
• Monitor network performance, availability, capacity, and utilization.
• Troubleshoot network connectivity, performance, routing, switching, wireless, and VPN issues.
• Maintain network configurations in accordance with organizational standards.
• Perform network upgrades, configuration changes, and infrastructure maintenance.
• Participate in scheduled and emergency maintenance activities.
• Administer and maintain firewalls, network security appliances, VPN infrastructure, and related security technologies.
• Implement network segmentation and access-control policies.
• Manage secure remote-access technologies and associated authentication requirements.
• Review firewall rules and network-access permissions for appropriateness and continued business need.
• Monitor network traffic and security events for suspicious or anomalous activity.
• Identify and address network-security weaknesses and misconfigurations.
• Implement security hardening standards for network infrastructure.
• Support the organization's vulnerability-management and remediation programs.
• Assist with security assessments, audits, and compliance activities involving network infrastructure.
• Maintain current documentation of security controls and network-security architecture.
• Monitor network and security-management systems for indicators of compromise, unauthorized access, abnormal activity, and policy violations.
• Investigate network-security alerts and incidents. Including completion of IT Security Incident report with supporting documentation to provide over to IT Management.
• Assist with containment, remediation, and recovery of network-related security incidents.
• Coordinate with IT staff and appropriate organizational personnel during cybersecurity incidents.
• Preserve appropriate technical information and documentation associated with security investigations.
• Participate in post-incident reviews and recommend improvements to prevent recurrence.
• Escalate significant security events in accordance with organizational procedures.
• Support network access-control technologies and associated authentication systems.
• Administer network-related users, device, and administrative access.
• Apply least privilege principles to network and security infrastructure.
• Revi…