Leidos is dedicated to making the world a safer place. This starts with helping our customers in the Defense Industry achieve their critical missions. Our dedicated Defense Group employees are solving critical challenges across the globe. At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. With offices across the United States engaging in the defense, space, cyber and commercial fields, Leidos provides responsive, cost-effective engineering, scientific and IT solutions. Leidos is well known for our people-oriented culture, positive work environment, technical excellence, and resilient business ethics.
We are seeking a highly motivated and detail-oriented Software Systems Engineer to support complex defense and government programs throughout the systems engineering lifecycle. The ideal candidate will have strong defense industry experience, expertise in requirements development and management, and hands-on experience with Model-Based Systems Engineering (MBSE) methodologies and tools including Cameo and Jama. This role requires collaboration with cross-functional engineering teams, program leadership, and government stakeholders to support system design, development, integration, verification, and delivery.
Primary Responsibilities
Perform systems engineering activities across the full system lifecycle including:
Requirements analysis
Functional decomposition
System architecture development
Integration & Test
Verification & Validation (V&V)
Configuration management
Risk management
Develop, analyze, and maintain system engineering documentation including:
Program Interface Documents (PIDs)
Interface Control Documents (ICDs)
System/Subsystem Specifications (SSS)
Software Requirements Specifications (SRS)
Support requirements decomposition, allocation, traceability, and change management activities.
Utilize Jama for requirements management, traceability, and collaboration across engineering teams.
Utilize Cameo Systems Modeler to develop and maintain MBSE artifacts and system models.
Support requirements decomposition, allocation, traceability, and change management activities.
Develop SysML diagrams including
Activity diagrams
Sequence diagrams
Use case diagrams
Interface models
Support model-based architecture development and interface definition activities.
Conduct technical reviews, requirements reviews, and design reviews with internal teams.
Collaborate with software, hardware, cybersecurity, integration, and test teams to ensure system performance and compliance.
Provide technical leadership and support cross-functional collaboration across program teams.
Ensure engineering products comply with customer requirements, program objectives, and industry standards.
Participate in risk identification, mitigation planning, and technical issue resolution
Required Qualifications
Be a US citizen with ability to obtain a security clearance
Bachelor’s degree in Systems Engineering, Electrical Engineering, Computer Engineering, Software Engineering, or related technical field.
4+ years of systems engineering experience or 2+ years with MS degree.
Prior experience supporting defense industry or Department of Defense (DoD) programs.
Hands-on MBSE experience using Cameo Systems Modeler.
Experience with model-based architecture development and SysML modeling.
Experience using Jama for requirements management and traceability.
Strong experience in requirements development and management.
Experience developing and maintaining:
Program Interface Documents (PIDs)
Interface Control Documents (ICDs)
System/Subsystem Specifications (SSS)
Software Requirements Specifications (SRS)
Experience with:
Requirements analysis
Functional decomposition
System architecture development
Verification & Validation (V&V)
Integration & Test
Configuration management
Risk management
Familiarity with Jira and Confluence collaboration tools.
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.
June 26, 2026
For 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.
Pay Range $87,100.00 - $157,450.00
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.
Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health. The company's global workforce of 48,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $15.4 billion for the fiscal year ended December 29, 2023.
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 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, visit careers.leidos.com for our latest opportunities.
