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Network Administrator

Job in Aurora, Arapahoe County, Colorado, 80012, USA
Listing for: Seneca Resources
Full Time position
Listed on 2026-07-14
Job specializations:
  • IT/Tech
    Network Engineer, Systems Administrator
Salary/Wage Range or Industry Benchmark: 65000 - 95000 USD Yearly USD 65000.00 95000.00 YEAR
Job Description & How to Apply Below

Location: Onsite (Potential for Limited Telework Based on Customer Needs)

Employment Type: Full-Time

Schedule: Monday – Friday, with occasional weekend support as required

Travel: Less than 10%

Clearance:
Active DoD Secret Clearance Required

Position Overview

We are seeking an experienced Network Administrator II to support a large-scale enterprise IT environment. This role is responsible for maintaining secure, reliable network infrastructure and telecommunications systems while ensuring optimal performance across LAN/WAN environments. The ideal candidate will have experience supporting enterprise networks, troubleshooting connectivity issues, and administering network hardware and software in a secure government environment.

Key Responsibilities
  • Administer, maintain, and troubleshoot enterprise LAN/WAN infrastructure.
  • Install, configure, and support network hardware including routers, switches, firewalls, and telecommunications equipment.
  • Monitor network performance and proactively identify and resolve connectivity issues.
  • Perform routine maintenance, system upgrades, and patch management on network devices.
  • Support the implementation and maintenance of secure network architectures.
  • Analyze network performance and recommend improvements to maximize availability, reliability, and efficiency.
  • Evaluate hardware and software requirements and provide recommendations for upgrades, replacements, and new technologies.
  • Assist with network documentation, inventory management, and configuration management.
  • Work closely with systems administrators, cybersecurity personnel, and engineering teams to support enterprise IT operations.
  • Respond to network outages and support after-hours or weekend maintenance activities when required.
  • Ensure compliance with applicable security policies, standards, and best practices.
Required Qualifications
  • Experience administering enterprise LAN/WAN environments.
  • Hands‑on experience configuring and troubleshooting Cisco or similar enterprise networking equipment.
  • Knowledge of TCP/IP, DNS, DHCP, VLANs, routing, switching, and network protocols.
  • Experience supporting enterprise telecommunications infrastructure.
  • Strong troubleshooting and problem‑solving skills.
  • Experience installing, maintaining, and upgrading network hardware and software.
  • Ability to document network configurations and operational procedures.
  • Strong verbal and written communication skills.
  • Ability to work independently while collaborating within a team environment.
Preferred Qualifications
  • CompTIA Security+ or other DoD 8570/8140 compliant certification.
  • Cisco certifications such as CCNA or CCNP.
  • Experience with network monitoring and management tools.
  • Familiarity with virtualization and cloud networking concepts.
  • Experience supporting government or military IT environments.
  • Knowledge of network security best practices, STIGs, and vulnerability remediation.
What You'll Bring
  • A strong understanding of enterprise networking principles and infrastructure.
  • The ability to quickly diagnose and resolve complex network issues.
  • A proactive approach to maintaining secure, highly available network environments.
  • Strong organizational skills and the ability to support mission‑critical operations in a fast‑paced environment.
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