Cyber Intrusion Detection System Administrator - TS/SCI with Polygraph

About the role

As a Cybersecurity Analyst Principal at GDIT, you will protect customers’ systems, networks, and data while supporting cyber missions for the Defense Intelligence Agency and other federal agencies. The position is performed directly at the customer site and involves leading and managing the cyber tool stack, implementing defensive rules, and collaborating on incident reporting and analysis.

Responsibilities

• Lead, manage, and support the customer’s cyber tool stack and defensive rule implementation.
• Collaborate with other government agencies to record and prepare incident reports, analysis methodology, and results.
• Provide insight to Detection and Response teams on signature functionality and perform signature tuning as needed.
• Monitor and analyze signature alerts from Intrusion Detection/Prevention Systems (IDS/IPS) for false positives.
• Create and maintain Splunk dashboards.
• Provide guidance and work leadership to less‑experienced staff.
• Utilize tools such as Splunk, Snort signatures, PCRE, Yara rules, Suricata, Palo Alto firewalls, and Fidelis.
• Apply advanced data‑analytics techniques using Splunk, SQL, Python, and statistical modeling.

Qualifications

• Bachelor’s degree in a related field or equivalent experience.
• 8+ years of relevant cybersecurity experience.
• Active Top Secret/SCI clearance with polygraph.
• U.S. citizenship required.
• Work performed directly at the customer site.

Skills

• Cyber Defense
• Data Analysis
• Information Assurance
• Perl Compatible Regular Expressions (PCRE)
• Authoring Yara rules and Snort signatures
• Experience with Splunk, SQL, Python, and statistical modeling
• Familiarity with IDS/IPS tools such as Snort, Suricata, Palo Alto firewalls, and Fidelis

Benefits

• Comprehensive medical, dental, and vision plan options (including HSA‑eligible plans).
• 401(k) plan with company match (pre‑ and post‑tax contributions).
• Full flex‑work weeks where possible.
• Paid time off including vacation, sick, personal, holidays, parental, military, bereavement, and jury duty leave.
• Short‑ and long‑term disability, life, AD&D, personal accident, critical illness, and business travel/accident insurance.
• Wellness packages and other employee‑focused programs.

Pay

The likely salary range for this position is $148,750 – $201,250. Compensation will be set based on experience, geographic location, and contractual requirements and may fall outside this range.

Schedule

• Weekly hours: 40
• Travel: less than 10%
• Telecommuting: On‑site work only
• Primary work location: Reston, VA (USA)
• Additional possible locations: Colorado Springs, CO; Washington, DC