Senior Network Administrator

Agil3 Technology Solutions (A3T)-posted 3 months ago
Full-time • Senior
Alexandria, VA
11-50 employees
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The Senior Network Engineer is a key technical expert responsible for designing, implementing, and maintaining the agency’s enterprise network infrastructure. This role focuses on the stability, performance, and security of LAN, WAN, wireless, VoIP, and data center networks, with a strong emphasis on Cisco and Palo Alto technologies. The Senior Network Engineer leads complex troubleshooting, contributes to network architecture and secure configuration baselines, and mentors junior administrators, ensuring the network supports mission-critical operations.

  • Install, configure, maintain, and troubleshoot Cisco routers, switches, wireless access points, and firewalls across enterprise environments.
  • Configure and manage Palo Alto firewalls, including security policies, VPNs, and threat prevention features.
  • Lead troubleshooting of complex Layer 2/3 routing and switching issues, including protocols such as BGP, OSPF, EIGRP, HSRP, MPLS, and QoS.
  • Support network services for VoIP, data center connectivity, and SDN technologies.
  • Develop, document, and maintain secure network baselines, operational runbooks, and network topology diagrams.
  • Perform capacity planning, performance monitoring, and network optimization.
  • Research and evaluate emerging networking technologies, providing recommendations for modernization and improvements.
  • Mentor junior administrators, provide knowledge transfer, and serve as a Tier 3 escalation point for network incidents.
  • Collaborate with cybersecurity teams, SOC, and CSIRT to maintain compliance with federal security standards (FISMA, NIST, DISA STIGs).
  • Support continuity of operations (COOP), disaster recovery (DR), and network failover testing.
  • Prepare and deliver reports, metrics, and status updates to the COR and agency leadership.
  • Bachelor’s degree in Computer Science, Information Systems, Engineering, or related field.
  • At least 10 years of enterprise network administration/engineering experience, or CCIE certification with equivalent depth.
  • Expert knowledge of Cisco networking platforms (Catalyst, Nexus, ASA, ISR, Meraki).
  • Experience configuring and managing Palo Alto firewalls and Panorama.
  • Strong understanding of LAN/WAN, SDN, wireless networking, VoIP, and data center connectivity.
  • Proficiency in routing and switching protocols (BGP, OSPF, EIGRP, MPLS).
  • Demonstrated experience creating technical documentation, diagrams, and SOPs.
  • Excellent problem-solving, communication, and leadership skills.
  • Active industry certifications such as: CCNP/CCIE (Cisco), Palo Alto PCNSE, CompTIA Network+, VMware VCP-NV.
  • Prior experience supporting federal government IT networks.
  • Experience with Azure/AWS/GCP networking, hybrid cloud, and VPN connectivity.
  • Active security clearance (Public Trust minimum, Secret or higher preferred).
  • Medical Insurance
  • Dental Insurance
  • Vision Insurance
  • Life Insurance
  • Short Term & Long-Term Disability
  • 401k Retirement Savings Plan with Company Match
  • Paid Holidays
  • Paid Time Off (PTO)
  • Tuition and Professional Development Assistance
  • Parking/Travel Reimbursement (metropolitan areas)
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