NASA Space Vehicle Modeling and Simulation Engineer

Company: CACI
Location: Houston
Posted on: April 2, 2026

Job Description:

Job Title: NASA Space Vehicle Modeling and Simulation Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: NACI Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Continental US * * * The Opportunity: CACI is looking for an experienced Space Vehicle Modeling and Simulation Engineer to work with NASA's human-rated spacecraft systems in support of our Nation’s space exploration initiative at NASA / Johnson Space Center in Houston, TX. Candidates should have great interest in spacecraft vehicles and systems, enjoy working with software, and most of all, possess a great passion to contribute to our Nation’s exploration of space. This work involves math model and simulation development, integration, verification and validation on Linux PC platforms using the Trick© Simulation Environment and Development Toolkit. Individual will execute large-scale simulation verification and validation tasks and develop math models and simulations in support of the Artemis program for NASA space vehicles lunar base, and lunar surface exploration . The ideal candidate has spacecraft domain experience in Guidance, Navigation, and Controls and a strong simulation development background. The engineer in this role will support lunar base and lunar surface exploration simulation unit test development, code coverage analysis, verification, and validation for Class C simulation software. The engineer will identify and implement improvements to math models and simulation scenarios, analyze simulation data to evaluate system characteristics and performance, and support continual enhancements to the simulation architecture. This position requires a self-motivated, capable person with strong verbal and written communication skills. In addition to outstanding technical expertise, the individual must be very people savvy with strong customer relationship skills, possess a positive team-player attitude, and be flexible and willing to take on new assignments and responsibilities as they arise. Finally, the most qualified candidate will be an articulate speaker able to communicate complex technical ideas in a convincing manner, must share our passion for our Nation's Space Program, and share in the excitement of developing the next human-rated space vehicles. Responsibilities: Develop space vehicle system and subsystem simulation math model requirements, verify model requirements, and validate the simulation and models. Design and develop math models for spacecraft systems and subsystems including hardware and software. Develop simulation scenarios to test nominal and off-nominal spacecraft operations. Perform analysis on simulation data to investigate spacecraft system performance. Present analysis results and their impact on spacecraft performance, vehicle design and mission design to customers. Qualifications: Required: U.S. Citizen or Permanent Resident for access to USG Facilities. B.S. in Aerospace or Computer Engineering, Computer Science, or related disciplines with experience in software development, including overall project design, programming, testing, verification, validation, and documentation. 5 years of experience working with aerospace vehicle simulations and math model development. Greater experience is highly valued. 5 years of experience with simulation and math model verification and validation processes. 5 years minimum experience with C++ and Python in a Linux environment. Greater experience is highly valued. Experience with software version control tools such as git. Strong computer and software skills in Linux environments. Ability to manage multiple priorities with minimal supervision. Highly responsible, team-oriented individual with strong work ethic. Desired: M.S. Aerospace or Computer Engineering, Computer Science or Modeling and Simulation and relevant work experience in aerospace software development projects. Experience with NASA NPR 7150.2 Class C Certification requirements. Experience with software simulation programming and scenario development, e.g., NASA / CACI Trick simulation is a plus. Experience with NASA’s VERAS Python tool suite is a plus. Experience with spacecraft simulation development using NASA JEOD. 5 years of experience with one or more spacecraft domain including orbital dynamics; robotic dynamics; Guidance, Navigation, and Controls; flexible body dynamics; vehicle kinematics; sensors; and effectors. Greater experience is highly valued. Experience with Continuous Integration tools and methods. Experience with Monte Carlo simulation methods. Experience with MATLAB/Simulink. This position is contingent on funding and may not be filled immediately. However, this position is representative of positions within CACI that are consistently available. Individuals who apply may also be considered for other positions at CACI. What You Can Expect: A culture of integrity. At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation. An environment of trust. CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality. A focus on continuous growth. Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. The proposed salary range for this position is: $76,000 - 155,700 USD CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.

Keywords: CACI, Houston , NASA Space Vehicle Modeling and Simulation Engineer, IT / Software / Systems , Houston, Texas