Modeling and Simulation Engineer

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. Your greatest work is ahead! Leidos’ Defense Systems, Weapons Sensors, Advanced Sensors and Protective Technologies Portfolio is seeking a talented Modeling and Simulation Engineer to function full-time within the Advanced Sensors and Protective Technologies Portfolio. You will join a diverse team of software developers, engineers, and scientists to help create unique solutions for complex problems. Our team solves important problems that make a difference and support our customers in the current and future defense of our nation; primarily in the areas of modeling & simulation, sensor integration & characterization, data analysis, algorithm development, and testing for electro-optical infrared (EO/IR) systems. Candidate will be expected to execute within the Agile/Scrum framework to develop analysis tools and data products, productively contribute to a team environment, and communicate effectively with management, coworkers, and customers. If this sounds like the kind of environment where you can thrive, keep reading! 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. To explore and learn more, click here! Are you ready to make an impact? Share your resume with us today! Primary Responsibilities. Work closely with a team of engineers and scientists to utilize a variety of data to solve problems in the realm of EO/IR sensor systems Work and communicate effectively with a multidisciplinary team while having familiarity with software concepts and tools often used for modeling and simulation (e.g. scene generation, signal processing techniques, numerical methods, meshing, thermal solvers, etc.) Basic Qualifications. Candidate must have a bachelor’s degree from an accredited university in mechanical engineering, electrical engineering, optical engineering, engineering physics, software engineering, computer science, or an equivalent engineering or science degree with relevant experience plus 4-8 years of experience in a related field or a master’s degree from an accredited university in mechanical engineering, electrical engineering, optical engineering, engineering physics, software engineering, computer science, or an equivalent engineering or science degree with relevant experience plus 2-6 years of experience in a related field. Candidate must be a resident of the North Alabama area or willing to relocate to the Huntsville - North Alabama, AL area. Candidate must be a U.S. Citizen and possess (and be able to maintain) a Final Secret Clearance or meet the eligibility to obtain (and maintain) a Final Secret Clearance. Candidate should possess experience with the following Setting up and running medium- to high-fidelity EO/IR signature generation M&S frameworks Extending EO/IR signature generation M&S frameworks through development Hardbody modeling and signature generation and analysis EO/IR sensor system modeling (noise, blur, motion/jitter, etc.) Evaluating simulation outputs and comparing against real data Preferred Qualifications. Active SECRET clearance or above Familiarity or interest in EO/IR phenomenology and experience with image processing Experience and demonstrated skill in any of the following Windows and Linux development Version control with Git Physics and Control System (Proportional, Integral, and Differential) Knowledge Specific Tooling: FLITES, sgPrime, C++ 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: May 22, 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 $87,100.00 - $157,450.00 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 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 here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to View email address on click.appcast.io. Commitment and Diversity 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.