Software Systems Engineer

Leidos; Huntsville (AL); On-site; USD 131,300 - 237,350; Full time

Benefits offered by this job

Competitive compensation

Job summary

Leidos is seeking a highly motivated Software Systems Engineer to support defense and government programs across the systems engineering lifecycle. The role emphasizes MBSE with Cameo and Jama for requirements, and SysML modeling across cross‑functional teams.

The successful candidate will develop system architecture, manage requirements, and lead technical reviews while ensuring adherence to program objectives and industry standards.

Qualifications

• US citizen eligible for security clearance.
• Minimum bachelor’s degree in a related engineering field.
• 12+ years of systems engineering experience or 10+ years with an MS degree.
• 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/configuring PIDs, ICDs, SSS, and SRS.
• Familiarity with Jira and Confluence tools.

Responsibilities

• Perform systems engineering across the full lifecycle: requirements, decomposition, architecture, integration, V&V, CM, risk management.
• Develop and maintain system engineering documentation: PIDs, ICDs, SSS, SRS.
• Support requirements decomposition, allocation, traceability, and change management.
• Use Jama for requirements management and traceability across teams.
• Use Cameo Systems Modeler to develop MBSE artifacts and system models.
• Create SysML diagrams: activity, sequence, use case, interface models.
• Lead technical reviews and collaborate with software, hardware, cybersecurity, and test teams.
• Provide technical leadership and ensure compliance with customer requirements and standards.

Skills

Security clearance

MBSE

SysML modeling

Jama

Requirements management

PIDs/ICDs/SRS/SSS

Jira/Confluence

Education

Bachelor’s degree in Systems Engineering, Electrical Engineering, Computer Engineering, Software Engineering, or related technical field

Master’s degree in a related field (preferred)

Tools

Cameo Systems Modeler

Jama

SysML

Jira

Confluence

Job description

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.
• 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.
• 12+ years of systems engineering experience or 10+ 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.

Pay Range

Pay Range $131,300.00 - $237,350.00

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.

Original Posting

July 27, 2026

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That’s why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.