This Department of War enterprise data and analytics program delivers mission-critical capabilities that enable leaders across the Department to make faster, better-informed decisions using trusted data at scale. Leidos Digital Modernization sector is seeking an experienced SME Cybersecurity Systems Engineer to support the delivery, enhancement, and adoption of enterprise data and analytics products used across multiple DoD organizations.
In this role, you will work alongside government partners, engineers, and other industry teammates to translate operational and strategic requirements into scalable, production-ready solutions. You will contribute directly to product planning, execution, and continuous improvement—helping ensure capabilities are delivered efficiently, aligned to mission priorities, and positioned for sustained success.
This position offers the opportunity to work on a high-visibility, enterprise program at the intersection of data, analytics, and emerging AI technologies. Ideal candidates are motivated by mission impact, comfortable operating in complex stakeholder environments, and interested in building deep domain expertise while delivering capabilities with real-world national security outcomes.
Primary Responsibilities:
Design and implement cybersecurity plans, architectures, and test descriptions leveraging FOSS, COTS, and GOTS products to meet system security requirements.
Develop cybersecurity and information assurance artifacts using MBSE and other engineering tools to demonstrate security implementations mapping to ATO and RMF requirements.
Own the data platform’s security strategy, policies, and procedures, ensuring consistent application of security controls across development, deployment, and operational workflows.
Prepare, maintain, and execute a System Engineering Plan (SEP) for managing all systems architecture and system engineering aspects of the program.
Conduct systems engineering activities required to specify, build, and maintain system engineering designs for the System.
Design, prepare, and document systems engineering and cybersecurity artifacts for the System.
Define, document, maintain, and promulgate APIs and technical standards for using and interoperating within and outside the System.
Design, engineer, integrate, and continuously improve the underlying infrastructure of the System, including cloud environment, network, data storage, logging, auditing functions, and more.
Identify, prepare, track, secure, and integrate government, commercial, and open-source tools and services into the System.
Design, architect, engineer, and continuously improve the user interface (UI) and user experience (UX) components.
Design, build, and maintain services and products to make production-ready AI/ML models accessible for customer use.
Prepare and maintain cybersecurity architecture and system engineering solutions for the System, ensuring compliance with Federal, DoD, and agency-specific security policies.
Perform site reliability engineering to build and maintain a reliable, scalable, and efficient System.
Participate in the Engineering Control Board (ECB) process for supporting all major engineering milestones and decisions for the program.
Basic Qualifications:
Active TS/SCI clearance with CI Poly.
Bachelor’s degree in Computer Science, Engineering, Information Systems, Cybersecurity, or related technical discipline and 12 + years of relevant experience OR Master’s degree in a related field and 10 + years of relevant experience.
At least one of the following foundational qualification pathways consistent with DoD 8140 requirements:
Current DoD 8570/8140 baseline certification appropriate for Advanced Cyber Defense Analyst roles (e.g., GCFA or GCIA),
Offerings listed in the DoD 8140 Training Repository,
Demonstrated equivalent training and experience qualifying under DoD 8140 foundational qualification alternatives.
Minimum of 10 years of experience in cybersecurity systems engineering to include leading teams of cybersecurity engineers in the development of security features, policy, and accreditation elements in concert with DoD security standards
Experience with MBSE and other engineering tools.
Proven experience in developing cybersecurity and information assurance artifacts.
Experience with FOSS, COTS, and GOTS products.
Experience in designing and implementing cybersecurity plans and architectures.
Preferred Qualifications:
CISSP, CCSP, CASP+, or equivalent advanced cybersecurity certification.
Experience implementing enterprise-scale Zero Trust Architecture.
Experience leading advanced cyber defense analytics, SIEM/SOAR integration, or detection engineering teams.
Experience implementing automated compliance and continuous monitoring solutions.
Experience supporting multi-enclave DoD environments.
Experience supporting enterprise data, analytics, or AI platforms in secure environments.
Clearance Required:
Must possess Active TS/SCI clearance with CI Poly 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:March 9, 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.
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