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Network Administrator

Job in San Antonio, Bexar County, Texas, 78208, USA
Listing for: Jobtailor
Full Time position
Listed on 2026-07-20
Job specializations:
  • IT/Tech
    Network Engineer, Cybersecurity, Network Security, Network Administrator
Salary/Wage Range or Industry Benchmark: 100000 - 125000 USD Yearly USD 100000.00 125000.00 YEAR
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.
Requirements
  • 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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