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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Network Administrator - **Company:** TEKSYSTEMS INC. - **Location:** San Antonio, TX, United States - **Experience:** Experienced - **Contract:** Temporary contract - **Skills:** IEEE 802.1X, Access Network, Border Gateway Protocol, Cyber Security, Networking Hardware, Internet Protocol Security (IP SEC), OSI Models, Network Security, Network Troubleshooting, Network Layer, Network Monitoring, Open Shortest Path First (OSPF), Virtual Local Area Networks, Dynamic Routing, Computer Network Operations, Connectivity Problems, Break Fix, Information Technology, Network Support, Routing & Switching - **Published:** October 2, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9209987/network-administrator ## About the Role Active TS/SCI security clearance. - Current DoD 8570/8140 IAT Level II certification, such as Security+ CE. - Bachelor's degree in Computer Science, Information Technology, or a related discipline and 4+ years of relevant experience. Additional relevant experience may be considered in lieu of a degree. - Strong Layer 3 troubleshooting and break/fix experience. - Strong understanding of the OSI model and network troubleshooting methodology. - Previous experience troubleshooting site-to-site/IPsec tunnels. - Experience monitoring network performance, availability, and security. - Experience configuring and troubleshooting switches and routers. - Experience with dynamic routing protocols, including BGP and OSPF. - Experience with VLAN configurations. - Experience configuring or supporting 802.1X. - Ability to work third shift, 10:00 PM to 6:00 AM, including applicable weekends and holidays in a 24x7 operational environment. - Ability to work 100% onsite in San Antonio, TX. Preferred / Relevant Experience: - Experience supporting enterprise or government networks. - Experience within secure or classified network environments. - Experience working in a network operations environment where administrators are responsible for troubleshooting through resolution rather than simply monitoring and escalating. - Familiarity with Palo Alto environments. - Experience supporting network security connectivity and secure tunneling technologies. ## Description We are seeking a Network Administrator III to support a highly secure enterprise network environment in San Antonio, TX. This opportunity goes beyond a traditional network operations center role. While network monitoring is part of the position, team members are expected to take ownership of technical issues, perform hands-on troubleshooting, and work problems through resolution rather than simply escalating incidents. The successful candidate will support day-to-day network operations and incident response within a modern, highly automated environment supporting secure enterprise services. This is an excellent opportunity for a network professional who enjoys hands-on troubleshooting and wants broader technical responsibility within a mission-critical environment. Responsibilities: - Monitor network connections, performance, availability, and security. - Identify network risks and issues proactively and take appropriate steps to mitigate them. - Troubleshoot and resolve Layer 3 network connectivity issues. - Support incident response and day-to-day network operations. - Troubleshoot site-to-site IPsec tunnel connectivity. - Investigate user and service connectivity problems and drive issues toward resolution. - Configure, install, and maintain network devices and supporting software. - Support network maintenance, installation, and security activities. - Configure and troubleshoot VLANs and network access controls. - Work with dynamic routing protocols including BGP and OSPF. - Support 802.1X configuration and troubleshooting. - Escalate complex issues to senior engineers or vendors when appropriate. - Work collaboratively within a secure, mission-critical enterprise environment. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [What Makes Open Source Work: Licensing and Beyond](https://www.wearedevelopers.com/videos/1416-what-makes-open-source-work-licensing-and-beyond) - [Don't Change the Partition Count for Kafka Topics!](https://www.wearedevelopers.com/videos/138-don-t-change-the-partition-count-for-kafka-topics) - [Small, Secure, Interconnected: The next Internet Protocol](https://www.wearedevelopers.com/videos/100062-small-secure-interconnected-the-next-internet-protocol) - [Going Quantum: The future of the internet ...](https://www.wearedevelopers.com/videos/672-going-quantum-the-future-of-the-internet) - [Data Mining Accessibility](https://www.wearedevelopers.com/videos/802-data-mining-accessibility) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Best Companies in the Netherlands: Top 25 Companies in 2023 ](https://www.wearedevelopers.com/magazine/193-best-companies-in-the-netherlands-top-25-companies-in-2023) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries)