Modern Technology Solutions, Inc. (MTSI) is seeking a highly qualified Modeling and Simulation Analysis Engineer to fulfill a critical Systems Engineering and Technical Assistance (SETA) position supporting the Space Development Agency (SDA).

The SDA is redefining traditional Department of Defense acquisition timelines by pioneering a rapid, spiral-development methodology to field hundreds of advanced satellites every two years. At the core of this mission is the Proliferated Warfighter Space Architecture (PWSA), a resilient, low-Earth orbit constellation that fundamentally enhances national defense capabilities.

Based at SDA Headquarters in Chantilly, VA, you will be responsible for ensuring the model's portability across platforms, extending its capabilities, incorporating network metrics, representing the impact of availability and reliability, and performing analysis to support verification and system testing. The ideal candidate will possess a strong background in space systems and modeling and simulation techniques, along with significant experience using STK (Systems Tool Kit).

While SDA Headquarters is located in Chantilly, VA., remote options will be considered.

Role and Responsibilities*

The Modeling and Simulation Analysis Engineer serves as a critical technical force within MTSI, enabling accurate, high‑fidelity representation of complex space architectures and ensuring analytically sound decision‑making across government and industry stakeholders. By advancing system-level models, integrating essential performance and network parameters, and driving analytical rigor that underpins verification and testing, this engineer directly strengthens the reliability and responsiveness of emerging national defense capabilities. This role offers a unique opportunity to shape the digital backbone of future proliferated LEO constellations, ensuring that cutting‑edge mission performance is validated, trusted, and ready to support the modern warfighter.

Your essential job functions will include but may not be limited to:

Model Development

• Understand the existing model's architecture and dependencies.
• Refactor and optimize the model to ensure it can run as a standalone application.
• Thoroughly test and validate the model’s performance and accuracy.
• Continuously expand the model’s capabilities to represent more complex space system behaviors and interactions.
• Implement new features and functionalities based on stakeholder requirements.
• Extend the model to support analysis and simulations for current and future system developments.
• Incorporate network metrics such as latency, bandwidth, and packet loss to represent the impact of network performance based on separate network analyses.
• Develop and integrate models representing the availability and reliability of space system components and subsystems.

Verification & System Test Support

• Perform detailed analysis using the model to support verification and system testing activities.
• Develop test cases and scenarios to validate accuracy and identify potential issues.
• Generate reports and presentations summarizing analysis results and recommendations.
• Work closely with verification and test teams to ensure the model effectively supports their activities.

STK Expertise

• Utilize STK extensively for modeling and simulating space system environments, including satellite orbits, communication links, and sensor coverage.
• Develop and maintain STK scenarios and models.
• Integrate STK with other modeling tools and platforms.

Documentation & Collaboration

• Maintain comprehensive documentation of the model's architecture, functionality, and usage.
• Collaborate effectively with engineers, analysts, and stakeholders to ensure the model meets project needs.
• Participate in technical reviews and presentations.

Qualifications and Education Requirements*

Qualifications

• 5+ years of experience in modeling and simulation of space systems.
• Significant experience with STK (Systems Tool Kit) required.
• Experience with software development and scripting languages such as Python, MATLAB, or C++ is a plus.
• Demonstrated ability to work in a fast paced, dynamic environment
• Experience working with commercial and/or Government satellite systems
• Experience or knowledge with agencies in the DoD community
• Strong work ethic with the willingness and flexibility to adapt to changing direction
• Strong analytical and problem-solving abilities.

Preferred/Desired Experience:

• 5+ years of experience in the DoW or Intelligence Community

Education Requirements:

• Bachelor’s degree in Aerospace Engineering, Electrical Engineering, Computer Science, or a related field. (REQUIRED)
• Master’s degree in Aerospace Engineering, Electrical Engineering, Computer Science, or a related field. (DESIRED)

Clearance Requirements:

• Active Top Secret clearance
• Candidate must be able to obtain and maintain a TS/SCI clearance as a condition of employment.
• U.S. Citizenship is required for this position.

Location/Travel Requirements:

• This position will be located in Chantilly, VA. and is eligible for remote work options with Government customer concurrence.
• This position may require travel up to 10% of time

The pay range for this position in Chantilly is $150,000 to $220,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applications will be accepted on an ongoing basis. This posting will be renewed periodically until the position is filled.

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Perks and Benefits

• Vacation:

  New Hires Accrue 20 days of PTO and 10 Holidays per Year

• Health Insurance:

  Zero Deductible Health Plans

• Flexible Schedules:

  Flex Schedules

• Professional Development:

  Up to $10,000 Annual Education/Training Reimbursement

• ESOP:

  Funded Stock Ownership Plan

• 401k Match+:

  6% 401k Match + Immediate Vesting

• Bonus Program:

  Semi-Annual Bonus Opportunity

• Mentorship:

  Career Mentorship Programs

Why is MTSI a great place to work

• Interesting Work:

  Our co-workers support some of the most important and critical programs to our national defense and security.

• 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.

• 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.

• Great Benefits - Most Full-Time Staff Are Eligible for:

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

• 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 visitwww.mtsi-va.com

EEO Statement

MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.

Why is MTSI a great place to work

• Interesting Work: Our co-workers support some of the most important and critical programs to our national defense and security.
• 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.
• 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.
• Great Benefits - Most Full-Time Staff Are Eligible for:
• • Starting PTO accrual of 20 days PTO/year + 10 holidays/year
  • Flexible schedules
  • 6% 401k match with immediate vesting up to $9k annually
  • Semi-annual bonus eligibility (July and Decemeber)
  • Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account
  • Up to $10,000 in annual educational reimbursement
  • Other company funded benefits, like life and disability insurance
  • Optional zero deductible Blue Cross/Blue Shield health insurance plan
• 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