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From the employer's careers site First seen 26 Oct 2026

Cyber Intrusion Detection System Administrator - TS/SCI with Polygraph

GDIT Reston, VA On-site senior full-time

Salary

$148,750 - $201,250 per year

Apply on GDIT

Description

As a Cybersecurity Analyst Principal at GDIT, you will play a crucial role in helping to protect our customers' systems, networks, and data.

Responsibilities:

  • Lead, manage, and 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 provide signature tuning as needed.
  • Monitor and analyze signature alerts from Intrusion Detection/Prevention Systems (IDS/IPS) for false positives.
  • Create 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.

Requirements:

  • 8+ years of related experience.
  • Education: BS Degree or equivalent 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.

Benefits:

  • Comprehensive benefits and wellness packages.
  • 401K with company match.
  • Competitive pay and paid time off.
  • Full flex work weeks where possible.
  • Paid parental, military, bereavement, and jury duty leave.
  • Short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness, and business travel and accident insurance.

Skills

Required

  • Cyber Defense
  • Data Analysis
  • Information Assurance
  • Splunk
  • Snort signatures
  • Regular Expressions
  • Suricata
  • Palo Alto Firewalls
  • Fidelis
  • SQL
  • Python
Apply on GDIT