Systems/Network Engineer (TS/SCI /w poly required)

General Dynamics Information Technology (GDIT); Maryland; On-site; USD 164,000 - 201,000; Full time

Job summary

General Dynamics Information Technology (GDIT) seeks a seasoned Systems/Network Engineer SME with 20+ years of hands-on experience. You will design rack configurations, secure DoD networks, and implement Cisco switches/routers/firewalls, Palo Alto devices, and security appliances. Strong diag and troubleshooting skills are essential.

The role requires TS/SCI w/ Poly, US citizenship, and collaboration within teams to deliver network services and security solutions across complex environments.

Qualifications

• 20+ years of related network engineering experience.
• Experience with CISCO switches/routers/firewalls including 9300 series.
• Active TS/SCI w/ Polygraph security clearance required.

Responsibilities

• Design and develop rack configurations and network diagrams.
• Hardening network security in DoW environments.
• Support SSP development and network monitoring with Wireshark/Tripwire.
• Evaluate message receiving functions and Acks/Nacks.
• Verify proper network configuration and firewall traffic.
• Install switches, fiber, cables, and security devices on SERD for SCS/ESB.

Skills

CCNA Networking

Network Administration

Network Flows

Network Management

Network Setup

Wireshark

Tripwire

Network Troubleshooting

Network Security

Education

HS Diploma

Tools

Cisco IOS

JIRA

Confluence

Wireshark

Tripwire

Packet Tools

Visio

Excel

Job description

Req ID: RQ229159

Type of Requisition: Regular

Clearance Level Must Be Able to Obtain: None

Public Trust/Other Required: None

Job Family: IT Infrastructure and Operations

Skills:

Ccna Networking (Inactive),Network Administration,Network Flows,Network Management,Network Setup

Experience:

20 + years of related experience

US Citizenship Required:

Yes

SYSTEMS/NETWORK ENGINEER SME

A seasoned network engineer with over 20 hands on years' experience preferably in an intelligence community environment. The candidate should have experience with CISCO switches, routers and firewalls, dell and other servers, network laptops, network debug and analysis tools such as Wirehsark and Tripwire. The candidate should also have experience with devices such as Palo Alto, Haipe or other security appliances.

Experience should also include:

• Network security hardening experience

• Specific knowledge of CISCO switches, routers and firewalls to include the Cisco 9300 series switches

• Demonstrated ability to design and develop rack configurations drawings and network diagrams

• Expertise and knowledge of switches, routers, firewalls, security appliances and architectures of network as a service

• Network security and network hardening experience in DoW environments

• Support for SSP development

• Network Troubleshooting

• Evaluation of message receiving functions

• Assessment of Acks and Nacks

• Ability to understand specific functions

• Drawing and configuration of racks

• Assess if network is configured correctly

• Review firewall traffic (use of Packet Tools and Tripwire)

• Tools: Wireshark and others

• Ability to determine which side of the network problem is from a connection standpoint

• Network Requirements Evaluation and developing network diagrams in Visio, PowerPoint and Excel

• Physical Network Construction (installation of switches, fiber, cables security devices and more) on SERD for SCS/ESB

• Assistance to tamper and concealment group in assessing needs for design and deployed network
• HAIPE MTU assessment and review
• Fiber installation and removal
• Experience with JIRA, Confluence and similar tools

Candidate must interact well as an individual contributor or member of a focused team.

WHAT YOU'LL NEED TO SUCCEED

Bring your technology expertise and drive for innovation to GDIT. The Systems Engineer Sr Principal must have:

• Education: HS Diploma
• Experience: 10+ years of related experience
• Technical skills: Strong Network Experience
• Security clearance level: Active TS/SCI w/ Polygraph required
• US citizenship required

GDIT IS YOUR PLACE

At GDIT, the mission is our purpose, and our people are at the center of everything we do.

• Growth: AI-powered career tool that identifies career steps and learning opportunities
• Support: An internal mobility team focused on helping you achieve your career goals
• Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
• Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY

Explore an enterprise IT career at GDIT and you'll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

#MD_2026Alumni

#IntelligenceEngineered

The likely salary range for this position is $164,382 - $201,250. 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.

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 technology solutions 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 mission-ready capabilities in AI, cloud, cyber and software development.

Join our Talent Community to stay up to date on our career opportunities and events at https://gdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans