Principal Network Engineer Team Lead - TS/SCI clearance

Clearance Level
Top Secret
Network Engineering
Arlington, Virginia
Hybrid Workplace
Key Skills For Success

Cisco Networking Infrastructure


Networking Infrastructure

REQ#: RQ138559
Public Trust: None
Requisition Type: Regular
Your Impact

Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the Department of Defense’s mission to keep our country safe and secure.

Job Description

Transform technology into opportunity as a Principal Network Engineer Team Lead with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate.

At GDIT, people are our differentiator. As a Principal Network Engineer Team Lead, you will help ensure today is safe and tomorrow is smarter. Our work depends on Principal Network Engineer Team Lead joining our JSP ETM-NG (Joint Service Provider Enterprise Transport Management - Next Gen) team at the Pentagon in Arlington, VA.

This position provides technical leadership, oversight, and direction to the Core Transport Network Engineering team and mentors and instructs network engineers on best practices and the execution of network enhancements and upgrades and troubleshooting efforts in a large and complex network environment.

A successful candidate will be responsible for the health and maintenance of a large, complex networking infrastructure. This includes providing network administration and operational support to more than 8000 networked devices. The engineer will provide comprehensive network administration, security enhancements and remediation, and troubleshooting of network devices such as routers, switches, load balancers, VPNs, 802.11 Wireless, and VoIP. This position requires an understanding of best practices pertaining to network security and may require the development, deployment, and integration of network security services. Successful candidates should be able to work both independently and as part of a team.


  • Act as a subject-matter expert to network routing and switching, as well as network performance monitoring and troubleshooting.

  • Review completion and implementation of system additions and/or enhancements and makes recommendations to management and/or clients.

  • Evaluate new application, infrastructure and cloud decisions in existing context of applications, infrastructure, standards, current business strategy and future business strategy

  • Determine system specifications, input/output processes, and working parameters for hardware/software compatibility.

  • Provide guidance and work leadership to less-experienced IT staff and may have supervisory responsibilities.

  • Serve as liaison with senior clients, participating in meetings to ensure client needs are met.

  • Provides problem and incident resolution, including dealing with software and hardware vendor technical support

  • Deploy and maintain network hardware, peripherals, services, and settings in accordance with industry standards and project/operational requirements

  • Performs daily system monitoring; verifies the integrity and availability of networking hardware, services, systems, and key processes; reviews system and application logs

  • Documents and conducts changes during ASI windows

  • Provides leadership in on-call troubleshooting and issue resolution as required

  • Develops and maintains installation and configuration procedures

  • Collaborate with the Security team to identify and remediate application and operating system vulnerabilities

  • Acts as a liaison with other groups to provide information sharing pertaining to the needs of the diverse set of computer users supported by the client as a whole.

  • Develop scripts and other automation solutions to aid in the completion of migration and integration tasks.

  • Review problems to understand the root causes of issues and ensure proper fixes are implemented.

  • Provide high level expertise to multiple projects and tasks.

  • Maintain current knowledge of relevant technology as assigned.

  • Participate in special projects as required.


  • Security Clearance Level: Active TS/SCI clearance

  • Required Experience: 15 or more years of related information technology experience.

  • Required Certifications: DoD 8570 IAT Level II certification. Must have ONE or more of the following active network certifications: Cisco Certified Network Administrator (CCNA), Cisco Certified Network Professional (CCNP) or Aruba Certified Switching Associate (ACSA).

  • Education: Bachelor’s Degree in Computer Science or a related technical discipline.

  • Required Technical Skills: Expert knowledge of information technology principles, methods, and techniques. Extensive experience troubleshooting, managing and monitoring the health of Cisco and Juniper routers and switches. Extensive experience in Software Define Networks (SDN). Broad understanding of network infrastructure topologies, security policies, firewalls, and the L2/L3 switch and router infrastructure. Experience deploying, managing, and troubleshooting network systems, switching, and routing protocol standards such as: TCP/IP, MPLS, OSPF, BGP, SDN, and 802.1x. Experience managing and troubleshooting DNS, DHCP, IPAM, and NTP in a large multi-site environment. Experience with network security, including firewall, IDS/IPS, VPN, and vulnerability remediation. Experience using network management and analysis tools such as SNMP probes, network taps, and traffic analyzer. Experience with Network Management & Performance platforms, such as NetScout, IBM NetCool, Solarwinds NMS products, NetBrain, Infovista, Clearpass, Aruba, Arista. Experience building configurations using CLI. Experience with network security, including firewall, IDS/IPS, VPN, and vulnerability remediation. Creating and documenting processes and creating work instruction. Excellent hardware troubleshooting experience. Experience creating scripts to automate routine administration tasks. Experience with supporting teleworkers and remote access technologies

  • Required Skills & Abilities: Possess flexibility to operate in a highly dynamic environment while ensuring a high level of operational effectiveness. Experience working as a part of a large team and working directly with customers. Strong oral and written communication skills. Strong customer service skills

  • Location: Arlington, VA - onsite at the Pentagon.


  • 3+ years of SME level experience supporting DOD, DISA, or JSP Network environments.

  • Experience with proposals

  • Experience with F5 load balancers to include troubleshooting, configuring, upgrading, maintaining, and monitoring an enterprise F5 load balancer network architecture

  • F5 Network certification

  • Experience with Infoblox IP Address Management (IPAM) and DHCP preferred

  • Experience utilizing Remedy ITSM

  • Experience administering and troubleshooting server operating systems such as Linux, Windows, or UNIX

  • Experience with LDAP/PKI

  • Experience with Aruba network devices

  • Experience with Arista network devices

  • Experience documenting network topology using Visio


  • Full-flex work week to own your priorities at work and at home

  • 401K with company match

  • Comprehensive health and wellness packages

  • Internal mobility team dedicated to helping you own your career

  • Professional growth opportunities including paid education and certifications

  • Cutting-edge technology you can learn from

  • Rest and recharge with paid vacation and holidays









Work Requirements
Years of Experience

15 + years of related experience

* may vary based on technical training, certification(s), or degree


CompTIA - Security+ CE - CompTIA

Travel Required

Less than 10%

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 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.