Looking for an opportunity to make an impact?
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 sustainable. 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.
Are you ready for your next career challenge?
Leidos Defense Systems Sector provides a diverse portfolio of systems, solutions, and services covering land, sea, air, space, and cyberspace for customers worldwide. Solutions for Defense include enterprise and mission IT, large-scale intelligence systems, command and control, geospatial and data analytics, cybersecurity, logistics, training, and intelligence analysis and operations support. Our team is solving the world’s toughest security challenges for customers with “can’t fail” missions.
Leidos Land Systems has an exciting opportunity for a talented Software Systems Engineer to join a multi-disciplinary team within a matrixed organization to create unique solutions for complex problems, specifically regarding missile defense systems.
The Software Systems Engineer will support systems engineering needs throughout the software lifecycle of complex software systems. This includes deriving requirements, defining architecture and interfaces, driving software behaviors, and supporting verification and traceability of requirements. The selected candidate will develop and maintain a clear understanding of the overall software system functionality, interdependencies and interfaces. This includes communicating with a multi-disciplinary engineering team of both internal and external stakeholders. The selected candidate will also assist in maintaining the SysML software model in Cameo Systems Modeler.
Primary Responsibilities
Support verification and traceability of deliverables to software requirements
Assist in development of verification plans and process improvements
Develop and maintain a clear understanding of overall system interdependencies and interfaces
Derive software requirements with traceability to system requirements
Implement creative solutions to ensure program requirements are upheld
Basic Qualifications
Bachelor’s degree in Systems Engineering, Software Engineering, Computer Science, Computer Engineering, or equivalent degree with 2+ years of experience or Master’s degree.
Experience using requirement database tool(s) such as DOORS or Cameo Systems Modeler.
Demonstrated understanding of the top-down systems engineering process for architecture development and bottoms-up verification.
Experience in deriving requirements for complex systems.
Experience defining system interdependencies and interfaces.
Experience effectively collaborating and communicating within a multi-disciplinary team.
Experience working within an Agile environment (or equivalent).
Resident of the North Alabama area or willing to relocate to the Huntsville - North Alabama, AL area.
Must be a US Citizen and possess (and be able to maintain) a Final Secret Clearance or meet the eligibility to obtain (and maintain) a Secret Clearance.
Preferred Qualifications
Preferred candidates will also have experience and/or working knowledge with:
Model-Based Systems Engineering methodologies, particularly modeling in Cameo Systems Modeler (or equivalent) using SysML
DoD acquisition processes and methods
Software engineering throughout the software lifecycle
Object Management Group (OMG) Certified System Modeler Professional (OCSMP) certification
INCOSE Systems Engineering Professional (SEP) certification (ASEP or CSEP)
At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”
If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.
Original Posting:October 15, 2025For 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.
Top Skills
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.
