Join Leidos and Shape the Future of Cybersecurity Innovation
Leidos, a FORTUNE 500 company, is a global leader in delivering innovative technology solutions to customers in national security, engineering, and health industries. At Leidos, we are driven by a commitment to excellence, empowering our teams, contributing to our communities, and operating sustainably. Guided by our Mission, Vision, and Values, we are dedicated to doing the right thing for our customers, our people, and the world.
The Leidos Digital Modernization Sector is seeking a qualified and trained Active Cyber Defense Engineer, SME II for a role in an engineering support services program for U.S. Army customers at Aberdeen Proving Grounds, MD. The Active Cyber Defense Engineer, SME II is responsible for monitoring and analyzing the security posture of networks, servers, endpoints, and other systems to bring about the successful completion of the CYBERTRON program goals and objectives..
The CYBERTRON program delivers highly skilled engineering services to the U.S. Army C5ISR Center in their mission of cybersecurity research and development and cryptographic modernization.
Why Join Us?
Impactful Work: Be part of a team that develops secure, modern technology solutions to protect national security and defeat cyber threats.
Collaborative Environment: Work alongside talented professionals in a dynamic and innovative setting.
Professional Growth: Leverage your expertise while advancing your career through challenging and rewarding projects
Your Role and Responsibilities As a Cyber Security Engineer SME
Applying expert technical knowledge to design, implement, monitor, and upgrade cybersecurity measures to actively defend information systems and networks. This role functions as a technical expert across multiple project assignments and often mentors junior staff
Functional Responsibilities:
Vulnerability & Risk Assessment: Conducts vulnerability and risk assessments, and designs and implements solutions to protect the confidentiality, integrity, and availability of sensitive information.
Security Architecture & Design: Designs, develops, engineers, and implements solutions to multi-level security (MLS) and general security requirements for system architectures.
Incident Response: Provides support for complex computer network defense techniques, including identifying and investigating intrusions, and offering incident response and remediation support.
Monitoring & Analysis: Performs comprehensive computer surveillance/monitoring, analyzes information requirements, identifies vulnerabilities, and assists with making security improvements.
Technical Support: Serves as a technical resource for advising and assisting other departments on security-related projects and operational tasks.
Documentation & Planning: Prepares and delivers status reports, develops security standards, and participates in the design of information system contingency plans.
Basic Qualifications
Must be a US Citizen and possess a Secret Clearance
Bachelor’s degree in computer science, systems engineering, cybersecurity or other engineering discipline with up to 10+ years of relevant experience.
Appropriate DoD 8750 certification (Security+ or higher).
Requires expert knowledge of and ability to apply advanced technical principles, theories, and concepts.
Preferred Qualifications:
Eligible for TS / SCI
Master’s degree in computer science, systems engineering, cybersecurity or other engineering discipline
Experience supporting Army programs
Clearance Required:
Must possess an active DoD Secret clearance at time of consideration
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:February 5, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
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What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
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