Senior Cyber Infrastructure Engineer — On-Site & TS/SCI

i3; Chantilly (VA); On-site; USD 140,000 - 190,000; Full time

Job summary

i3 is seeking a Senior Cyber Infrastructure Engineer on-site in Chantilly, VA to design, build, and maintain secure, automated cyber testing environments and tooling for threat analysis and incident response.

The role focuses on automated workflows, secure data pipelines, CI/CD, and cross-team collaboration; requires TS/SCI clearance. You will mentor teammates and ensure scalable, resilient systems aligned with mission needs.

Qualifications

• 8+ years of experience in cybersecurity engineering or related fields.
• Experience with multi-platform virtualized environments and secure system design.
• Strong programming skills for automation and tooling development.
• Knowledge of CI/CD pipelines, version control, and automated builds.
• Familiarity with secure data flows and cybersecurity operations tools.
• Excellent troubleshooting, documentation, and collaboration skills.

Responsibilities

• Design and maintain multi-platform virtualized environments for testing and security operations.
• Build custom software utilities, automation scripts, and data processing tools.
• Develop secure data ingest pipelines and integrate tools across systems.
• Implement CI/CD pipelines, version control standards, and automation practices.
• Support secure posture development and ensure environments remain scalable.
• Translate mission requirements into functional, secure software solutions.
• Provide mentorship and contribute to cross-team standardization and process improvement.

Skills

8+ years experience

Cybersecurity engineering

Software engineering

Infrastructure automation

Secure system design

Automation programming

Tools

Angular

Django (Python)

PostgreSQL

Redis

Svelte

Python ETL

Cribl

Splunk

Job description

i3 is seeking a Senior Cyber Infrastructure Engineer on-site in Chantilly, VA to design, build, and maintain secure, automated cyber testing environments and tooling for threat analysis and incident response.

The role focuses on automated workflows, secure data pipelines, CI/CD, and cross-team collaboration; requires TS/SCI clearance. You will mentor teammates and ensure scalable, resilient systems aligned with mission needs.