Network Engineer (Firewall) SME: TS/SCI w/poly

Clearance Level
Top Secret/SCI
Network Engineering
McLean, Virginia

REQ#: RQ123204

Travel Required: Less than 10%
Requisition Type: Regular

The Network Engineer is responsible for designing technical solutions for complex problems. The candidate will provide technical oversight of a project solution, including requirement interpretation and allocation of requirements to technical components. The candidate will define processes to support the implementation of requirements. The candidate will be responsible for ensuring that technical solutions leverage industry best practices, designing for security and excellence while minimizing the total cost of ownership. Candidate should be able to define internal and external customer IT infrastructure architecture needs and then design solutions to meet those needs to include: capacity planning, systems configuration and tuning, monitoring backups, and installations of hardware and software. Candidate will be required to work independently with little supervision and should be flexible to work and support IT Operations needs as requested.


  • TS/SCI with polygraph

  • 8 years of related experience or equivalent combination of education and experience

  • 5+ years of experience configuring, designing, maintaining, and troubleshooting LAN/WAN devices

  • Thorough understanding of network routing concepts (EIGRP, OSPF, BGP, IP MPLS)

  • 5+ years of experience configuring/maintaining Cisco ASA/Next Generation Firewall

  • Experience configuring/maintaining other (non-Cisco) hardware firewall devices such as Palo Alto Network, F5, or Juniper Next Generation Firewalls

  • Basic understanding of QoS concepts

  • Experience with network monitoring technologies

  • Ability to take ambiguous requirements or problems and convert them into technical solutions

  • Ability to partner with systems administrators, storage administrators, and application developers to solve complex problems

  • Complex problem management research and issue resolution

  • Ability to mentor junior network engineers


  • Experience configuring, designing, and troubleshooting IP multicast streams

  • Experience configuring, designing, and troubleshooting QoS in LAN or WAN devices

  • Juniper, Palo Alto, or Cisco Next Generation Firewalls Certifications


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.