Network Administrator
Job in
San Antonio, Bexar County, Texas, 78208, USA
Listed on 2026-07-20
Listing for:
Jobtailor
Full Time
position Listed on 2026-07-20
Job specializations:
-
IT/Tech
Network Engineer, Cybersecurity, Network Security, Network Administrator
Job Description & How to Apply Below
Responsibilities
- Apply established technical standards and security policies for LAN topologies and network components
- Identify, analyze, and remediate network security vulnerabilities
- Install, configure, troubleshoot, and maintain enterprise network devices including Layer 2 and Layer 3 switches and routers
- Implement, troubleshoot, and support Voice over IP (VoIP) solutions
- Manage and administer Cisco Call Manager and Cisco Unity systems
- Install, relocate, troubleshoot, and remove VoIP telephones for customers as required
- Provide local common-user LAN and Campus Area Network (CAN) support, including troubleshooting and repair
- Install, configure, support, and troubleshoot Virtual Private Network (VPN) solutions for remote connectivity
- Support VPN appliances and wireless networking technologies
- Monitor LAN and CAN environments using enterprise network management tools to assess performance, analyze network activity, and ensure high network availability
- Perform network discovery, diagnostics, and fault analysis to identify and resolve network issues
- Generate and provide network utilization and performance reports
- Manage network hardware and software including configuration management and capacity management
- Develop, draft, and maintain Standard Operating Procedures (SOPs) related to network operations and support
- Maintain flexibility in scheduling to support after-hours or weekend work for special projects when required, while ensuring total work hours do not exceed 40 hours per week.
- Bachelor’s degree in computer science, Information Technology, or a related field
- 6+ years of experience in network administration, with significant experience in a government or complex enterprise environment
- DoD 8570/8140 IAT Level II baseline certification with current Continuing Education (CE) certification
- Or
- Cisco Certified Network Associate (CCNA) or Cisco Certified Network Professional (CCNP) - Demonstrated experience with enterprise network management and monitoring tools including:
Cisco Works, Net View, and Solar Winds Orion (NPM, Net Flow, and virtualization modules) in a heterogeneous network environment - Experience with wireless networking technologies including IEEE 802.11b/g/n standards
- Knowledge of wireless authentication protocols including EAP, PEAP, EAP-TLS, and EAP-TTLS
- Strong understanding of cabling standards, core networking protocols and services including TCP, UDP, IP, STP, CDP, HSRP, DNS, DHCP, VTP, VPN, FTP, TFTP, IAS, VoIP, NAT, and IEEE 802.1X
- Experience configuring, administering, and troubleshooting network hardware including Cisco ASA 5500 Series Adaptive Security Appliances;
Cisco 3000/4000/5000/6000 series devices;
Brocade/Ruckus multilayer switches and routers; and Cisco Unified IP Phones - Experience providing technical troubleshooting and touch support for enterprise or commercial network environments, including support for Pearson VUE testing center network infrastructure
- Demonstrated ability to communicate complex networking concepts to both technical and non-technical personnel
- Experience developing technical documentation, system design documentation, and operational procedures
- Ability to maintain a professional demeanor and represent the organization positively in customer-facing environments
- Ability to work a flexible schedule when operational requirements necessitate.
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