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TS​/SCI Network Security Engineer Polygraph | SIEM & OT​/ICS

Job in Herndon, Fairfax County, Virginia, 22070, USA
Listing for: Itlearn360
Full Time, Part Time, Seasonal/Temporary position
Listed on 2026-05-29
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer, Network Security
Salary/Wage Range or Industry Benchmark: 161500 - 218500 USD Yearly USD 161500.00 218500.00 YEAR
Job Description & How to Apply Below

Network Security Engineer - TS/SCI with Polygraph job ndon, VA.Responsibilities for this Position
Location: USA VA Herndon
Full Part/Time: Full time
Job Req: RQ210958 Type of Requisition:
Regular 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:
Cyber and IT Risk Management Job Qualifications:
Skills:
Industrial Control System, Risk Assessments, Splunk Enterprise Security, Supervisory Control and Data Acquisition (SCADA)
Certifications:
None
Experience:
8 + years of related experience
US Citizenship

Required:


Yes Job Description: Seize your opportunity to make a personal impact as a Network Security Engineer supporting customer activities. GDIT is your place to make meaningful contributions to challenging projects and grow a rewarding career. At GDIT, people are our differentiators. As a Network Security Engineer, you will help ensure today is safe and tomorrow is smarter. Our work depends on a Network Engineer joining our highly skilled team to be a premier provider of cyber security services to the customer.

HOW A NETWORK SECURITY ENGINEER WILL MAKE AN IMPACT

  • Communicate with team leaders and senior leadership, assess changes, and rapidly change direction in support of new and/or changing program requirements.
  • Identify risks to the critical infrastructure of the customer to protect against cyber threats from foreign states, hackers, and internal sources.
  • Utilize operations technology knowledge to integrate cybersecurity tools to identify, detect, protect, respond, and recover from cybersecurity events.
  • Serve as a customer facing expert in intrusion detection and prevention systems, network detection and response, packet capture, and/or other tools, supporting them to achieve success with the technology for their overall cybersecurity efforts.
  • Collaborate with project teams on their network architecture, sensor placement, and planning activities for the deployment of new technology.
  • Analyze and help maintain a process to coordinate improvements to the cyber security of critical infrastructure in a collaborative process with critical infrastructure owners to determine if current cyber security requirements are sufficient given current and projected risks.
WHAT YOU'LL NEED TO SUCCEED:
  • Education :
    Bachelors (Computer Engineering, Computer Science, Electrical Engineering, Information systems, Information Technology, Cybersecurity, or closely related discipline)
  • Required Experience : 8+ yrs
  • Required Technical

    Skills:

  • Demonstrated experience working in Network Defense, Network Security Architecture, and Networking Technology (various devices and vendors)
  • Experience designing to a broad range of policy, standards and common risk management methodologies - for example, NIST, ISO 27001/27002, PCI/DSS, COBIT, ITIL, ISO 2000, etc.
  • Demonstrated experience with Splunk, SIEM, and network data analytics
  • Knowledge of IT and OT protocols, IP networks, OSI model, and other protocols utilized by the customer
  • Possess good troubleshooting and problem-solving skills, strong technical and analytical abilities, and strong oral and written communication skills.
  • Ability to identify new technologies, assess their technical and performance characteristics, as well as utilize proficiency in risk assessment methodologies
  • Ability to create complex system designs, resolve engineering problems, and propose preventive strategies.
  • Ability to write technical documents addressing complex, sensitive issues
  • Strong analytical and problem-solving skills
  • Demonstrated ability to analyze Information System (IS) test results and suggest compensating controls for meeting IS security requirements
  • Desired

    Qualifications:

  • Linux (command line) experience (minimum of intermediate skill/experience), CENTOS, scripting languages (python, shell, etc.)
  • On-premises and Cloud software solutions for enterprise
  • Security Clearance Level : TS/SCI with active polygraph
  • Desired

    Certifications:

  • Cyber security certification in one or more of the following: CISSP, CCNP, CCSP
  • Location :
    Herndon, VA - customer site
GDIT IS YOUR PLACE:
  • 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
#WeAreGDIT
#JET
#GDITEnhanced
2025 The likely salary range for this position is $161,500 - $218,500. 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:
None Telecommuting Options:
Onsite Work Location:
USA VA Herndon Additional Work Locations:
Total Rewards at GDIT:
Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings…
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