Network Administrator

ASM Research • Oak Ridge, TN

7d

About The Position

The Network Administrator supports the design, operation, and maintenance of the organization’s enterprise network infrastructure. This role focuses on firewalls, routing, switching, VPNs, and network security, with a strong emphasis on Palo Alto, Cisco and Juniper technologies. The ideal candidate is comfortable handling day‑to‑day network operations, troubleshooting complex issues, and contributing to ongoing improvements in performance, reliability, and security.

Requirements

• Bachelor’s Degree in Information Technology, Computer Science or a related field or equivalent relevant experience; Master’s Degree preferred.
• 7-10 years of experience in information technology, systems administration or other IT related field.
• Hands‑on experience with Palo Alto Networks firewalls (Pan‑OS, Panorama preferred).
• Strong working knowledge of Cisco networking (Catalyst/Nexus switches, routers, wireless).
• Solid understanding of TCP/IP, VLANs, routing protocols (OSPF/BGP), VPN technologies, and network security principles.
• Experience with network monitoring and troubleshooting tools (e.g., SolarWinds, Wireshark).
• Ability to read, update, and maintain network diagrams and documentation.
• Proficiency in network monitoring tools, CLI-based administration, and automation frameworks.
• Strong knowledge of LAN/WAN, firewalls, VPNs, and cloud networking (Azure).
• Ability to support Windows, macOS, and Linux endpoints connected to enterprise networks.

Nice To Haves

• Palo Alto certifications (PCNSA, PCNSE).
• Cisco certifications (CCNA, CCNP).
• Juniper Networks certifications such as JNCIA, JNCIS, or JNCIP.
• Experience with cloud networking (Azure/AWS) or SD‑WAN solutions.
• Familiarity with Zero Trust concepts and modern security architectures.
• Strong troubleshooting skills for network connectivity, performance, and security issues.
• Excellent documentation and communication skills for technical and operational reporting.
• Strong communication skills and the ability to work independently on complex tasks.

Responsibilities

• Configure, maintain, and troubleshoot Juniper and Cisco switches, routers, and wireless infrastructure.
• Administer and support Palo Alto firewalls, including security policies, NAT rules, VPNs, and threat prevention features.
• Manage site‑to‑site and remote access VPNs, ensuring secure and reliable connectivity.
• Monitor network performance, availability, and capacity using approved tools.
• Perform routine maintenance, firmware upgrades, and hardware lifecycle tasks for network devices.
• Implement and enforce network security policies, segmentation, and access controls.
• Work with security teams to remediate vulnerabilities and maintain compliance with organizational standards.
• Maintain accurate documentation of firewall rules, network diagrams, and configuration baselines.
• Provide Tier II/III support for network‑related incidents, outages, and performance issues.
• Diagnose and resolve issues involving routing, switching, firewall rules, DNS, DHCP, VLANs, and wireless connectivity.
• Collaborate with systems, cloud, and security teams to support cross‑functional infrastructure needs.
• Maintain up‑to‑date configuration records in the CMDB.
• Follow established change management processes for network modifications.
• Assist in planning and executing network upgrades, migrations, and new deployments.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level