Senior Network Administrator

Summary

The Senior Network Administrator is responsible for the architecture, design, implementation, and support of enterprise IT and Operational Technology (OT) network systems, including data, voice, video, wireless, and industrial communications. This role ensures the secure, resilient, and scalable operation of all GBRA network environments. The position serves as a technical lead, establishing network standards, driving design decisions, and ensuring alignment with security and operational requirements across IT and SCADA/OT environments.

Strategy & Planning

• Develop and maintain network architecture standards, including LAN, WAN, WLAN, and OT network segmentation aligned with industry best practices.
• Create and maintain detailed network documentation, including diagrams, configurations, and standard operating procedures.
• Design and evaluate secure network architectures, including segmentation, firewall placement, and remote access strategies.
• Conduct research on network technologies, platforms, and vendors to support long-term infrastructure planning and modernization efforts.
• Lead capacity planning and performance analysis to ensure scalability and reliability across multi-site environments.
• Develop, test, and maintain disaster recovery and high-availability network designs.
• Collaborate with IT, SCADA, and GIS teams to align network design with business and operational requirements.
• Establish and maintain network asset monitoring and management practices, including inventory and lifecycle planning.

Operational Management

• Design, implement, and support LANs, WANs, WLANs, and OT networks, including routers, switches, firewalls, radios, and cellular technologies.
• Lead deployment of network infrastructure across corporate and field locations, ensuring consistency with architectural standards.
• Implement and maintain network segmentation between IT and OT environments, including DMZs and secure communication paths.
• Manage and ensure the effectiveness of network security controls, including firewalls, VPNs, and secure remote access solutions.
• Monitor network performance and proactively identify and resolve capacity, reliability, and security issues.
• Provide advanced troubleshooting and escalation support for complex network and communication issues.
• Coordinate with vendors and contractors for installations, upgrades, and issue resolution, ensuring adherence to standards.
• Support and maintain network communications and cellular connectivity for remote sites.
• Review and approve network changes to ensure alignment with established architecture and security standards.
• Provide technical guidance and training to junior team members.
• Perform other duties as assigned.

Knowledge, Skills, and Abilities

• Advanced knowledge of network architecture, design, and best practices in enterprise and critical infrastructure environments.
• Strong understanding of network security principles, including segmentation, defense-in-depth, and secure remote access.
• Experience with routing and switching technologies, including Layer 2 and Layer 3 protocols (OSPF, BGP, SD‑WAN preferred).
• Demonstrated experience in designing and implementing network segmentation between IT and OT environments is strongly preferred.
• Experience with enterprise networking platforms, including Cisco and Fortinet.
• Familiarity with industrial networking concepts and protocols (e.g., SCADA, Modbus, DNP3, OPC) preferred.
• Experience with wireless, radio, and cellular networking technologies (e.g., Cambium, Mimosa, Cradlepoint) is desirable.
• Proficiency with CLI-based configuration and troubleshooting tools.
• Ability to analyze complex problems and develop scalable solutions.
• Ability to communicate advanced technical concepts to both technical and non-technical stakeholders.
• Ability to work independently while also providing technical leadership and guidance to team members.
• Strong documentation, analytical, and problem-solving skills.

Education and Certifications

• Bachelor’s Degree in Computer Science, Computer Engineering, Information Systems, or related field from an accredited university preferred. Equivalent experience may be…