Network Administrator

Job Summary Under the direction of the IT Director, the Network Administrator designs, implements, and maintains enterprise and operational technology (OT) network infrastructure. This role supports secure, highly available environments across on-premises systems, virtualization platforms, and industrial control networks.The position emphasizes cybersecurity, monitoring/observability, and modern network architecture using industry best practices rather than vendor-specific implementations. Key Responsibilities Network Infrastructure Design and maintain LAN/WAN environments, including VLANs, routing, and segmentation Configure and support VPN technologies (IPsec, SSL VPN, secure remote access) Implement high availability and redundancy strategies Systems & Virtualization Support enterprise virtualization platforms and server infrastructure Maintain Linux and Windows Server systems Support containerized services and modern application hosting models Monitoring & Observability Implement and maintain infrastructure monitoring and alerting systems Develop dashboards and performance metrics for network and system health Troubleshoot issues using logs, metrics, and packet analysis Cybersecurity Configure and maintain network security controls (firewalls, IDS/IPS, segmentation) Support identity, access control, and certificate services Assist with compliance requirements (CJIS, NIST, or similar frameworks) Operational Technology (OT) / SCADA Support industrial networks and SCADA environments Maintain secure separation between IT and OT networks Monitor and support critical infrastructure systems Backup & Recovery Administer backup and recovery solutions Perform periodic recovery testing and validation Automation & Scripting Develop scripts to automate operational tasks and monitoring Improve efficiency through automation and integration Support & Collaboration Act as Tier 2/3 escalation for network-related issues Collaborate with Service Desk and other IT staff Work with vendors and service providers as needed Knowledge, Skills, and Abilities Strong understanding of TCP/IP networking, DNS, DHCP, VLANs, and routing Experience with network security principles and segmentation Familiarity with: Virtualization platforms Monitoring and alerting systems Linux and Windows Server environments Basic scripting knowledge (PowerShell, Bash, or Python preferred) Strong troubleshooting and analytical skills Preferred Experience Experience in public sector or critical infrastructure environments Exposure to industrial protocols (e.g., Modbus, SNMP) Familiarity with compliance frameworks (CJIS, NIST) Education & Experience Associate’s degree in Computer Science, Networking, or related field Certifications: A+, Network+, Security+, or similar required Minimum 3 years of network/system administration experience Equivalent combination of education and experience accepted Valid Texas Driver’s License required #J-18808-Ljbffr