Network Administrator

Responsibilities Administer, monitor, and troubleshoot enterprise LAN, WAN, wireless, VPN, and internet connectivity services across multiple TXCC office locations. Support and maintain routing, switching, DNS, DHCP, firewalls, and wireless network infrastructure. Implement and maintain secure network segmentation, least‑privilege access paths, and controlled network changes. Coordinate with carriers, managed service providers, hardware vendors, and internal support teams to resolve network service issues. Manage service tickets, change management processes, monitoring tools, documentation, and asset inventory practices in accordance with operational IT standards. Support endpoint, collaboration, identity, and cloud/SaaS dependencies that affect business network performance and user productivity. Develop and maintain network diagrams, capacity plans, and operational documentation. Assist with network procurement support, asset inventory management, cutover planning, migration support, and vulnerability remediation activities. Conduct incident‑related fact gathering and support after‑hours maintenance windows as authorized by TXCC. Work with TXCC staff and site support personnel to ensure network services remain available, secure, and ready for agency operations. Minimum Qualifications 8 years of experience administering, operating, and troubleshooting enterprise LAN, WAN, wireless, VPN, and internet connectivity services. 5 years of experience with routing, switching, DNS, DHCP, firewalls, wireless networks, network diagrams, and network performance monitoring. 5 years of experience implementing and maintaining secure network segmentation, least‑privilege access paths, and controlled network changes. 3 years of experience coordinating with carriers, managed service providers, hardware vendors, and internal support teams to resolve network service issues. 3 years of experience using ticketing, change management, monitoring, documentation, and inventory practices in an operational IT environment. 2 years of experience supporting endpoint, collaboration, identity, or cloud/SaaS dependencies that affect business network performance and user productivity. Preferred Qualifications 3 years of experience with Palo Alto, Juniper, Cisco, Aruba, Meraki, or equivalent enterprise firewall, switching, and wireless platforms. 2 years of experience with Microsoft 365, Entra ID, Intune, Teams Rooms, VPN replacement, zero trust, or identity‑governed remote access concepts. 2 years of experience supporting Texas public sector, higher education, critical infrastructure, CJIS, TAC 202, NIST, or similar regulated environments. 1 year of experience with or demonstrated equivalent of Network+, CCNA, PCNSA, JNCIA, CISSP, or a comparable certification. Additional Requirements Candidate must be a U.S. citizen. Candidate must pass all required background checks as authorized by Texas law. Occasional after‑hours support may be required with TXCC prior approval. Any travel, per diem, parking, and/or living expenses are at the candidate's expense; pre‑approved travel is subject to State of Texas travel rate requirements. Work Location and Schedule Location: TXCC San Antonio office, 506 Dolorosa Street, San Antonio, TX 78204, and TXCC Austin office, 1001 North Loop, Austin, TX 78757. Primary work location to be assigned by TXCC. Schedule: Monday through Friday, 8:00 AM to 5:00 PM, excluding State holidays. After‑hours, evening, weekend, and holiday work may be required with prior TXCC approval. Work Arrangement: Hybrid (on‑site and telework). Air InfoSec, LLC is an Equal Opportunity Employer and does not discriminate on the basis of race or ethnicity, religion, sex, national origin, age, veteran disability or genetic information or any other reason prohibited by law in employment. #J-18808-Ljbffr Airinfosec