Make an Impact with Leidos!
Leidos National Security Sector has an opportunity in the Integrated Tactical Warning/Attack Assessment (ITW/AA) and Missile Defense mission areas.
Your Greatest Work is Ahead!
This Software Engineer-UML Modeler role includes trade studies, system engineering, model-based system engineering, model-based system engineering, portfolio analysis, software development demonstration and product testing and deployment to Cheyenne Mountain. Leidos is focused on finding the best people, processes, and tools that will provide solutions in data integration and fusion, data analytics, data mining, predictive analytics, data visualization, and decision support tools.
This position will report directly to the Chief Architect.
Primary Responsibilities:
Document and communicate proposed software solutions with integrated, cross-functional engineering teams in a fast paced highly technical environment
Stay up-to-date on state-of-the-art programming techniques and software technologies
Participate in software design and code reviews to ensure delivery of quality products and enhance skill sets
Ability to create software solutions utilizing established industry standards
Work with System Engineering Team to schedule, synchronize and execute demonstration capabilities to customers
Work with third-party contractors and stakeholders on any potential regression coding due to deployment delays
Develop Class and Sequence Diagrams in UML to align with modular design patterns
Redesign existing software components to allow containerization of the applications
Identify components which do not comply with the modularity rules and work with the developers and customer to aid in bringing the component into compliance
Required Qualifications:
Bachelor’s degree in Software Engineering or related discipline with 4+ years of relevant experience. (Additional related experience, training, and/or certifications may substitute degree requirements)
US Citizen; Currently possess an active DoD Secret security clearance
Experience in C++ and Java programming
Experience with UML and SysML modeling language tools
Strong ability to work independently and collaboratively within engineering teams
Familiarity with Agile software development processes
Preferred Qualifications:
Master's degree in associated field
Effective communication skills and experience managing multiple tasks
Experience with missile warning and missile defense
Understanding of missile warning message types
Experience understanding structure and components of monolithic applications to effectively break them down for containerization
Experience analyzing and improving performance of containerized applications
EIO 2024
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:December 3, 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.
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