Expert Network Engineer - TS/SCI with Polygraph

Clearance Level
Top Secret SCI + Polygraph
Systems Engineering
Chantilly, Virginia

REQ#: RQ137619

Travel Required: None
Requisition Type: Regular

We are seeking highly motivated engineers with a thirst for learning, in support a geographically dispersed, state of the art systems that seamlessly integrate Linux and Microsoft services. Positions will provide engineering support to multiple WAN connected sites, with data flows crossing various controlled interfaces, and will follow specific IT project management and engineering lifecycle processes. Engineers will be responsible for supporting their solutions throughout the IT project lifecycle, to include refining requirements, creating design documentation, creating installation instructions and deployment plans, and providing O&M support. Project assignments will vary based on skill level, and may include engineering geographically dispersed services, integrating services into public, private and hybrid cloud environments, engineering solutions to be deployed via automated CM tools, and hardening the solutions to address security and SCAP compliance.


  • Administer, operate, manage and maintain network components for on-premises and cloud-based virtualized systems

  • Design, develop, implement, and maintain (LAN, MAN, WAN, Wireless) network infrastructure

  • Determine network bandwidth needs and recommend measures to meet those requirements

  • Design, recommend and implement new solutions to improve the resilience of network operations

  • Conduct network modeling and analysis to construct a reliable, high-performance integrated network

  • Monitor network performance and troubleshoot problems and outages

  • Schedule updates and upgrades

  • Collaborate with network architects to optimize system performance

  • Engage in data network fault investigations

  • Secure network systems with policies that define and monitor access

  • Configure DNS servers and appliances

  • May serve as a team or task lead

  • Participates in special projects as required

Required Skills:

  • Active TS/SCI and CI polygraph

  • BA/BS or equivalent experience

  • 15+ years of experience

  • CompTIA Security+ or similar for IAT Level II DoD 8570 certification

  • Understanding of networking protocols (e.g., IPSEC, HSRP, BGP, OSPF, 802.11, QoS)

  • Candidate should be familiar with the following technologies and protocols.

    • Layer 2: Ethernet, ATM, Frame Relay, PPPoE, STP, 802.1q, 802.1x, MPLS, L2VPNs

    • Layer 3: IP, IPv6, LDP, L3VPNs, RSVP, DHCP, IPSEC, PIM, IGMP

    • Layer 4: TCP, UDP

    • Routing Protocols: BGP, OSPF, IS-IS, EIGRP

    • Other: SNMP, RADIUS, TACACS+

  • Ability to setup, configure, upgrade, manage, and troubleshoot Cisco and Juniper routers, switches, firewalls, and Riverbed devices

  • Experience with various cloud provider environments such as AWS and Azure

  • Experience with managing work tasks via tools such as JIRA and ServiceNow

  • System configuration based on security guidelines such as DISA STIGs


About Our Work

We are GDIT. The people supporting some of the most complex government, defense, and intelligence projects across the country. We deliver. Bringing the expertise needed to understand and advance critical missions. We transform. Shifting the ways clients invest in, integrate, and innovate technology solutions. We ensure today is safe and tomorrow is smarter. We are there. On the ground, beside our clients, in the lab, and everywhere in between. Offering the technology transformations, strategy, and mission services needed to get the job done.

COVID-19 Vaccination

GDIT does not have a vaccination mandate applicable to all employees. To protect the health and safety of its employees and to comply with customer requirements, however, GDIT may require employees in certain positions to be fully vaccinated against COVID-19. Vaccination requirements will depend on the status of the federal contractor mandate and customer site requirements.

GDIT is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.