Modeling and Simulation Software Engineer

Leidos is hiring a Modeling and Simulation Engineer with an active Secret clearance in our Beavercreek Ohio Office. The successful candidate will use strong technical capabilities and communication skills to collaborate with technical teams of engineers and scientists to integrate an infrared threat simulation into a multispectral few-on-few engagement simulation environment.

Perform tasks related to the integration of an infrared threat simulation into a multispectral few-on-few, C++ based simulation environment

Work with a team of engineers and collaborate on team tasking

Collaborate with teams of government and contractor personnel

Participate in the design and implementation of tools that support the wider multispectral simulation

Test and evaluate implementations, provide feedback to developmental team and team partners

Develop, code and test software and prepare documentation requested by the government customer

• Bachelor’s degree in CS, CE, EE or a related field with 2+ years of applicable experience or an MS degree in CS, CE, EE, or a related field
• Experience with C++
• Linux
• Experience with modeling and simulation (M&S) techniques
• Excellent English-language written and verbal communication.
• Strong emphasis on writing ability
• Great people skills and the desire to work with technical teams of engineers and scientists
• Ability to work independently and under deadlines in a mixed government-contractor environment
• To be considered, must have a current and active Secret security clearance

• Experience working with modeling and simulation, Python, GPU compute, HPC resources, EO/IR sensor phenomenology, infrared threat systems
• Previous experience with department of defense software applications NKE

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:
September 14, 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:
Pay Range $69,550.00 - $

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 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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit

• competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave and Retirement

More details are available here.

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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.