Cyber Systems Security Engineering Sr - E3

Standard Job Description

Cyber Systems Security Engineer (CSSE) – TTWCS Program

At Lockheed Martin Rotary and Mission Systems, we are shaping the future of defense and security through innovation, integrity, and visionary thinking. Our teams apply the highest standards of business ethics and technical expertise to design solutions that safeguard our nation and allies. Every day, we push boundaries to ensure mission success—and we invite you to be part of this critical work.

As a Cyber Systems Security Engineer (CSSE) supporting the TTWCS program, you will:

• Perform periodic manual and automated STIG evaluations, tracking deltas across versions and platforms.
• Conduct cyber risk assessment activities, including threat modeling, vulnerability analysis, and evaluation of mitigation strategies.
• Develop, analyze, and validate security AI design constraints within the cyber domain.
• Collaborate with cybersecurity engineers, system architects, and developers to ensure robust, secure system solutions.
• Conduct cybersecurity test and evaluation of hardware and software to verify compliance with requirements.
• Apply and ensure consistent use of cybersecurity processes, methods, techniques, and tools.
• Prototype and implement software solutions supporting assessment and authorization activities required by customers.

This position requires the ability to obtain and maintain a DoD government clearance at the Secret level.

This position is based out of King of Prussia, PA and is hybrid but required to work onsite 3 days a week.

This position requires the ability to travel up to 10%.

We are Lockheed Martin, a global security and aerospace leader. Our Rotary and Mission Systems (RMS) business area delivers solutions that connect people, protect freedom, and advance the state of technology in areas such as naval systems, radar, cyber, and missile defense.

You are a mission-driven engineer with a strong background in cybersecurity and systems engineering. You thrive in collaborative environments and are passionate about applying your skills to safeguard systems against evolving threats. Your ability to assess risks, develop secure designs, and validate solutions makes you a trusted partner in ensuring mission success.

At Lockheed Martin, your skills, training, and education are valued—and your future is limitless. You’ll join a team that empowers innovation, supports professional growth, and makes a tangible impact on global security. From day one, you’ll be part of something bigger: protecting what matters most.

• Minimum 7+ years of experience in cybersecurity, systems engineering, information assurance or relevant experience
• Experience securing Linux and/or Windows operating systems in enterprise or mission environments.
• Experience with Automation tools specifically Ansible and familiarity with deployment automation
• Experience with vulnerability scanning and remediation tools.
• Experience with scripting languages and automation tools
• Ability to obtain and maintain a DoD Secret clearance (or higher, as required).

• Possess an approved DoD 8570 baseline certification for IAT Level II (CISSP, CAP, etc.)
• Experience supporting DoD weapon systems, aviation platforms, or classified mission systems.
• Experience with Containerization technologies to include Kubernetes and Openshift
• Experience with Virtualization platforms/hypervisors
• Experience implementing container security and Kubernetes hardening.
• Familiarity with SIEM Tools deployment and administration specifically Arc Sight
• Experience with Zero Trust architecture and cyber resiliency engineering.

Full-Time Salary Range: $110300.00 - $204900.00

At Lockheed Martin, we know…