Cyber Intrusion Detection System Administrator - TS/SCI with Polygraph

General Dynamics Corporation; Reston, Northern (VA, KY); Hybrid; USD 149,000 - 201,000; Full time

Job summary

GDIT seeks a Cybersecurity Analyst Principal in Reston, VA to advance national security through cyber operations. You’ll lead detection and response activities, manage IDS/IPS signatures, Splunk dashboards, and collaborate with government partners to record incidents. TS/SCI with Polygraph clearance and 8+ years of experience required.

You will tune signatures, analyze alerts, mentor junior staff, and support cyber tools across missions for government customers at the vendor site.

Qualifications

• 8+ years of related experience
• BS Degree or equivalent experience
• Experience with PCRE, Yara rules and snort signatures

Responsibilities

• Lead/Manage/Support the customer cyber tool stack and implement defensive rules.
• Collaborate with government agencies to record incidents and analysis methodology.
• Provide insight to Detection and Response teams on signature functionality and tuning as needed.
• Monitor and analyze IDS/IPS alerts for false positives.
• Create Splunk dashboards and mentor less-experienced staff.

Skills

Cyber Defense

Data Analysis

Information Assurance

Education

BS Degree or equivalent experience

Tools

Splunk

Snort

Suricata

Palo Alto Firewalls

Fidelis

SQL

Python

PCRE Regex

Job description

Cyber Intrusion Detection System Administrator - TS/SCI with Polygraph

Responsibilities for this Position

Location: USA VA Reston

Full Part/Time: Full time

Job Req: RQ228330

Type of Requisition: Regular

Clearance Level Must Currently Possess: Top Secret/SCI

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: Cyber Defense, Data Analysis, Information Assurance

Certifications: None

Experience: 8 + years of related experience

US Citizenship Required: Yes

Job Description:

CYBERSECURITY ANALYST PRINCIPAL

Advance your career while impacting our national security in cyber as a Cybersecurity Analyst Principal at GDIT. Here, technologists have many paths to grow a meaningful career supporting cyber missions and operations across the federal government.

MEANINGFUL WORK AND PERSONAL IMPACT

As a Cybersecurity Analyst Principal, the work you'll do at GDIT will be impactful to the mission of DIA. You will play a crucial role in helping to protect our customers systems. Networks, and data.

Lead/Manage/Support our customers cyber tool stack and ability to implement defensive rules.

Collaborate with other government agencies to record and prepare incident reports and analysis methodology and results.

Provide insight to Detection and Response teams on signature functionality and providing signature tuning as needed.

Monitoring and analyzing signature alerts from Intrusion Detection/Prevention Systems (IDS/IPS) for false positives.

Creating Splunk Dashboards

Provide guidance and work leadership to less-experienced staff

Utilize Splunk, Snort signatures, Regular Expressions, Suricata, Palo Alto Firewalls, Fidelis, etc

Experience using advanced data analytics tools and techniques, such as Splunk, SQL, Python, and statistical modeling.

Utilize Splunk, Snort signatures, Regular Expressions, Suricata, Palo Alto Firewalls, Fidelis, etc

WHAT YOU'LL NEED TO SUCCEED

Bring your cyber expertise and drive for innovation to GDIT. The Cybersecurity Analyst Principal must have:

Education: BS Degree or equivalent experience

Experience: 8+ years of related experience

Technical skills: experience with Perl Compatible Regular Expressions (PCRE), authoring Yara rules and snort signatures

Security clearance level: TS SCI / with Polygraph

US citizenship required

Role requirements: work is performed directly at customer site.

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 a career in cyber at GDIT and you'll find endless opportunities to grow alongside colleagues who share your focus on defending and protecting what matters.

#GDITCareers

#WeAreGDIT

#VA_2026Alumni

#CO_2026Alumni

#JET

The likely salary range for this position is $148,750 - $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.

Scheduled Weekly Hours: 40

Travel Required: Less than 10%

Telecommuting Options: Onsite

Work Location: USA VA Reston

Additional Work Locations: USA CO Colorado Springs, USA DC Washington

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 gdit.com/tc .

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

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GDIT supports and secures some of the most complex government, defense, and intelligence projects across the country.