Join Leidos as a Security Engineer in Lorton, VA

Leidos Digital Modernization Sector seeks a skilled Security Engineer for our Lorton, VA office supporting the Homeland Enterprise Information Technology Secure Services & Support (HEITS) Program for the Department of Homeland Security. Deliver cybersecurity and information assurance in a high-impact federal mission.

Primary Responsibilities

• Administer and harden Linux servers (RHEL, Rocky, Ubuntu) including OS configuration, patching, and security baseline enforcement.
• Install, configure, and maintain Tenable platforms (Tenable.sc, Nessus, Agents) for continuous vulnerability scanning.
• Develop scanning policies, schedules, and dashboards for security posture visibility.
• Analyze scan results, validate true/false positives, and drive remediation with teams.
• Map findings to NIST 800-53, DISA STIGs, CIS benchmarks, and policies.
• Support secure baselines, hardening guides, and compliance reporting.
• Collaborate with infrastructure/DevOps on security integration in pipelines.
• Participate in incident response, log review, and forensics for Linux hosts.
• Maintain BOE documentation, SOPs, and track remediation progress.

Basic Qualifications

• Bachelor’s in Cybersecurity/IT/Computer Science + 8+ years (or equivalent experience).
• 5–8+ years Linux administration/security in enterprise settings.
• Active TS/SCI clearance.
• Tenable.sc/Nessus expertise in configuration and reporting.
• Vulnerability lifecycle knowledge; NIST/STIGs/CIS experience.
• Linux CLI, scripting (Bash/Python/Ansible).
• SIEM integration and risk communication skills.

Preferred Qualifications

• Configuration tools like Ansible, Puppet, Chef, Salt.
• Zero-trust network designs and secure architectures.

Salary range: $107,900 - $195,050 USD annually. Leidos offers competitive benefits and career growth in defense IT.