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Senior Tier III Network Engineer

NewGen Technologies
Chantilly, VA Full Time
POSTED ON 6/15/2026
AVAILABLE BEFORE 7/14/2026

NewGen Technologies has an opening for a Tier III O&M Network Engineer to support the Customer’s various wide area networks (WANs) and local area networks (LANs). This position will provide routing to an enterprise level infrastructure across multiple classifications and act as subject matter experts in routing technologies across multiple vendors.

This position requires office presence a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered.

Responsibilities

  • Tier III O&M of Juniper and Cisco routers include extensive troubleshooting at the layer 2 and layer 3 level and implementation of routing changes.
  • Troubleshoot network issues related to connectivity, latency, asymmetric routing
  • Implement routing and troubleshoot issues related to the following protocols: OSPF, BGP, MPLS, VRF’s, VPN’s
  • Support technical exchange meetings to help resolve other ISP and application owner issues
  • Support problem management to conduct root cause analysis of recurring issues
  • Provide day-to-day Operations and Maintenance (O&M) support for incident management events and outages
  • Collaborate with IT staff on projects and initiatives
  • Work with corresponding technical support teams as required to resolve network traffic concerns
  • Utilize monitoring tools and log collectors to provide in-dept analysis of traffic anomalies and issues
  • Candidate will be on call after hours on a rotational basis
  • Not required but experience with Palo Alto, Cisco Adaptive Security Appliance (ASA), and Forcepoint firewall equipment and applications is a plus
Requirements
  • TS/SCI CI Poly Clearance
  • 16 years of experience that can be a combination of work history and education. This equates to a Doctorate and 8 years, master’s and 10 years, bachelor’s and 12 years, associates and 14 years or HS diploma and 16 years. 
  • Compliant with DoD 8140 Information Assurance Technical (IAT) Level 2
  • Experience with configuring and troubleshooting Juniper and Cisco routers and switches
  • Experience with protocols such as OSPF, BGP, VPN’s, VRF’s, MPLS
  • Understanding of routing, switching, Internet Protocol (IP) subnet, Network Address Translation (NAT) and security technologies
  • Demonstrated ability to engineer and modify rulesets to allow connectivity for new customer requirements
  • Demonstrated ability to read, understand, and develop schematic diagrams, technical manuals, and documentation such that the supported equipment and software can be maintained with minimal training
  • Working knowledge of Service Now or similar IT Service Management (ITSM) products
  • Superior verbal and written communication skills
  • Intermediate-level knowledge of MS Office products Word, Excel, PowerPoint, and Visio

About Us
For more than 20 years, NewGen Technologies has solved our clients’ toughest IT challenges with integrity, security, and outstanding service by delivering both technology and talent. We have helped secure borders, have used artificial intelligence (AI) to fight terror, aided the identification of criminals, and have helped to prevent crime through the introduction of biometrics. Our team of Highly Cleared Specialists have hard-to-find skills and expertise in a wide spectrum of technologies to provide solutions that transform business processes and solve problems of national significance. #CJ

Salary.com Estimation for Senior Tier III Network Engineer in Chantilly, VA
$197,962 to $226,840
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