Software Engineer - UML Modeler

Description

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, 2025

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 :

Pay Range $85,150.00 - $153,925.00

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.

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 .

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 .

Securing Your Data

Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@ .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission .

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.