Senior Network Engineer - TS/SCI with Polygraph

Type of Requisition: Pipeline Clearance Level Must Currently Possess: Top Secret SCI + Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Cisco, CISSP, Local Area Network (LAN), Transport Technologies, WAN Networking Certifications: None Experience: 8 + years of related experience US Citizenship Required: Yes Job Description: Location: Springfield, VA (Customer Site) Travel: Approximately 25% Clearance: Active TS/SCI with ability to obtain a Polygraph Citizenship: US Citizenship Required GDIT has an exciting and challenging opportunity for a Network Engineer supporting an Intelligence Community customer’s wide-area (WAN), local-area (LAN), and campus-area (CAN) networks across multiple security domains. In this role, you will support new engineering initiatives, lead efforts around network modernization, and ensure the sustained operation of mission‑critical infrastructure. Responsibilities: Coordinate system maintenance, monitoring, and installation activities across diverse WAN/LAN environments and technologies. Research, recommend, and implement enterprise network capabilities and enhancements aligned with mission and business objectives. Troubleshoot and resolve issues with network media, components, and connectivity. Evaluate and monitor network health, performance, and hardware/software effectiveness. Develop and maintain technical roadmaps for network capabilities, operations, and technologies. Create and execute detailed test plans and documentation for all network configuration changes, upgrades, and additions. Support network traffic analysis and bandwidth optimization to meet performance and availability targets. Assess and provide recommendations on emerging network and communication technologies. Recommend upgrades and changes aligned with industry standards and best practices. Adhere to all customer network security policies, procedures, and compliance requirements. Represent customer requirements and priorities during technical exchanges with partner agencies. Conduct site surveys for new installations and technology refresh initiatives. Install, maintain, and troubleshoot satellite communications equipment. Create and maintain network architecture diagrams. Required Qualifications: Active TS/SCI clearance with ability to obtain a Polygraph BS degree or equivalent experience 8+ years of hands-on experience with network and transport technologies, tools, and techniques 4+ years supporting large-scale enterprise or global networks in a fast‑paced, diverse environment Active 8570/8140 Approved IAT II certification required Working knowledge of DoD Architecture Framework and related DoW network architecture guidance Experience with Juniper network devices (MX, EX, SRX) and cryptographic devices (KG‑175G/X, KG‑245A/X) Proficiency with network analysis tools (HP/Microfocus NA/NNM, Juniper Secure Analytics, Infoblox, Riverbed) Experience with Juniper firewall/VPN technologies (SRX series) Experience supporting IP services for NIPRNET, SIPRNET, and JWICS (IPv4/IPv6, VPN, Multicast, QoS, SDN, SNMP, VOIP, VTC, etc.) Strong understanding of OSPF, BGP, MPLS, RSVP/LDP Layer 2/3 VPNs, VRFs, IKE/IPSec, GRE tunnels, MTU, FTP, and routing policy frameworks Desired Qualifications: Master’s degree in Computer Science or related field Professional certifications such as JNCIA, JNCIS, JNCIP, CCNP, CCVP, CCNA, or CCDP ITIL v3 Foundations ISC2 CISSP The likely salary range for this position is $111,155 - $150,385. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range. Scheduled Weekly Hours: 40 Travel Required: 10-25% Telecommuting Options: Onsite Work Location: USA VA Springfield Additional Work Locations: USA MO St. Louis Total Rewards at GDIT: Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most. Our Identity Verification Process: As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes. About Our Work: We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. Join our Talent Community to stay up to date on our career opportunities and events at gdit.com/tc. Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans Join our 26,000 everyday heroes. We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 30 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology. For more information about GDIT's Privacy Policy, click here: Privacy Policy | GDIT