Subsystem Modeling Engineer

• Design, develop, and maintain models for key subsystems of space systems, including propulsion systems, thermal control systems, power systems, communications, and payloads.
• Perform modeling and simulation efforts to analyze subsystem performance, reliability, and mission readiness under varying conditions.
• Utilize advanced tools (e.g., MATLAB, Simulink, ANSYS, STK) to simulate subsystem behaviors, interactions, and responses to operational environments.
• Conduct trade studies, gap analysis, and sensitivity analyses to evaluate subsystem design choices and optimize performance.
• Collaborate with systems engineers and program managers to provide actionable insights into subsystem design and integration processes.
• Support subsystem integration with broader space architectures to ensure compatibility with satellites, ground systems, and mission objectives.
• Validate subsystem models through testing and verification processes, analyzing test data against simulation predictions.
• Present modeling results, reports, and technical recommendations to program leadership, government customers, and engineering teams.
• Stay updated on emerging technologies, modeling methodologies, and space system advancements to drive continuous improvement in subsystem modeling efforts.
• Ensure compliance with DoD standards and program specifications through rigorous validation and documentation of subsystem models.

• Bachelor's degree in Aerospace Engineering, Mechanical Engineering, Systems Engineering, Physics, or a related technical field (Master's degree preferred).
• Minimum of 15 years of experience in subsystem modeling, simulation, and analysis within the space systems domain.
• Extensive background in developing and validating models for propulsion systems, thermal management, power systems, or other subsystem technologies.
• Proven ability to perform subsystem-level trade studies and influence technical design decisions.

• Active Top Secret clearance with Sensitive Compartmented Information (TS/SCI).

• Proficiency in subsystem modeling and simulation tools such as MATLAB, Simulink, ANSYS, STK, or equivalent platforms.
• Strong understanding of subsystem performance metrics, operational requirements, and mission readiness criteria.
• Familiarity with space mission concepts, including orbital mechanics, payload integration, and space domain situational awareness.

• Master's degree in Aerospace Engineering, Mechanical Engineering, or a related discipline.
• Certifications in relevant areas of modeling and simulation, such as Certified Modeling and Simulation Professional (CMSP).
• Experience working on DoD or Intelligence Community (IC) programs involving complex space systems.
• Knowledge of space environment factors, including radiation effects, thermal dynamics, and vacuum constraints on subsystem performance.
• Familiarity with emerging technologies such as AI/ML for predictive subsystem modeling and anomaly detection.
• Hands-on experience with flight systems, fault tolerance modeling, or autonomous system modeling.

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  Interesting Work:
  
  
  
  Our co-workers support some of the most important and critical programs to our national defense and security.
  
  
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  Values:
  
  
  
  Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry.
  
  
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  100% Employee Owned:
  
  
  
  We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year.
  
  
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  Great Benefits - Most Full-Time Staff Are Eligible for:
  
  
  




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  Starting PTO accrual of 20 days PTO/year + 10 holidays/year
  
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  Flexible schedules
  
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  6% 401k match with immediate vesting up to $9k annually
  
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  Semi-annual bonus eligibility (July and December)
  
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  Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account
  
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  Up to $10,000 in annual educational reimbursement
  
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  Other company funded benefits, like life and disability insurance
  
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  Optional zero deductible Blue Cross/Blue Shield health insurance plan
  




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  Track Record of Success:
  
  
  
  We have grown every year since our founding in 1993.
  
  

Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance

MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.

For more information about MTSI, please visit www.mtsi-va.com