Senior Systems Engineer - IT

Overview

Lockheed Martin is seeking a Senior Systems Engineer‑IT to join the Radiant Mercury team. The role focuses on maintaining the security posture, compliance, and lifecycle management of Commercial Off‑the‑Shelf (COTS) hardware and software systems.

• Security patching & hardening:
  Execute quarterly RHEL OS patching and apply hardening measures per RTB requirements.
• Vulnerability & compliance management:
  Monitor, assess, and remediate vulnerabilities across supported platforms to maintain DoD and program security standards.
• System & firmware updates:
  Manage firmware and software updates for COTS servers and network devices, coordinating with vendors for secure implementation.
• Incident response & troubleshooting:
  Provide technical support for security incidents, system outages, and customer inquiries.
• Automation & scripting:
  Develop and maintain Bash and Python scripts to automate security checks, patching, and monitoring.
• Testing & validation:
  Support security and functional testing activities, including procedure development, execution, and documentation.
• Customer engagement:
  Collaborate with customers to understand mission requirements and recommend secure system configurations within the Radiant Mercury framework.
• Documentation:
  Maintain detailed records of system configurations, security controls, and remediation activities.

• Bachelor’s degree in Cybersecurity, Computer Science, Engineering, or related field.
• 3+ years of experience in cybersecurity, system administration, or related technical role.
• Strong knowledge of RHEL system administration, patching, and security hardening.
• Solid understanding of networking principles (TCP/IP, routing, switching).
• Experience with vulnerability management and compliance frameworks.
• Familiarity with COTS server hardware and secure configuration practices.
• Strong analytical and problem‑solving skills.
• Excellent communication and interpersonal skills.
• Ability to obtain and maintain a Top Secret (TS) security clearance.

• Experience with cross‑domain solutions or other security‑focused technologies.
• Familiarity with virtualization and secure enclave environments.
• Experience with scripting languages (Bash, Python) for security automation.
• CompTIA Security+ or other DoD 8570 baseline certifications.
• Experience providing cybersecurity support in classified environments.

Position requires a government security clearance; US Citizen status is required. Clearance level: TS/SCI.

Primary location:
Deer Creek Facility, Littleton, Colorado. 4×10‑hour day, 3 days off per week. Limited remote telework is available.

Annual salary range: $85,500–$150,765 (state dependent). Benefits include medical, dental, vision, life insurance, short‑term and long‑term disability, 401(k) match, flexible spending accounts, and paid time off.

Lockheed Martin is an equal opportunity employer. Qualified candidates will be considered without regard to legally protected characteristics.