Simulation Engineer

Laurel MD Johns Hopkins Applied Physics Laboratory (APL)


We are seeking an engineer or scientist that is capable of designing and setting up a complex hardware in the loop (HWIL or HIL) to test weapon systems critical to our nation's defense.  If you have previous experience working with a hardware in the loop system or if you have strong background in electrical interfaces and software then you'll be an ideal candidate for this position.  You'll be joining a team that designs, builds and runs hardware in the loop (HWIL) systems around operational optical systems. We have experienced staff that will mentor those new to the field and are also looking for experienced staff that are capable of mentoring others. 


As a Simulations Engineer

  • Your primary responsibility will be working on building and running hardware in the loop setups around unique weapon systems. 
  • You will program in C++, taking care to understand latency, thread safety and pushing/pulling data from hardware interfaces.
  • You will work with embedded hardware systems and sensors, understanding the electrical interfaces and communications protocols.
  • You will document code, leverage our CI/CD systems, network systems together, communicate across the team your status and needs.


You meet our minimum qualifications for the job if you…

  • Possess a BS in Computer Engineering, Electrical Engineering, Computer Science, Physics, or similar field.
  • Have 2+ years of experience working with hardware in the loop, embedded systems, or C++ 6-DOF simulations.
  • Are skilled in software programming and are experienced in working with highly multi-threaded systems and object-oriented code
  • Have a deep understanding of electrical signals and how embedded systems communicate.
  • Are able to obtain an Interim Secret level security clearance by your start date and can ultimately obtain a Secret level clearance. If selected, you will be subject to a government security clearance investigation and must meet the requirements for access to classified information. Eligibility requirements include U.S. citizenship.

You'll go above and beyond our minimum requirements if you…

  • Have significant experience designing and setting up hardware in the loop test beds.
  • Have experience designing high fidelity (6-DOF) software simulations for flying platforms (missiles, planes, projectiles).
  • Familiar with weapon systems such as: missiles, seekers, naval platforms.
  • Familiar with one or more of: CUDA, FPGAs, compilers, or MPSoC, networking protocols, Python, Matlab, Simulink.
  • The ability and desire to learn new skills through documentation, classes, examples and experimentation.

Why work at APL?

The Johns Hopkins University Applied Physics Laboratory (APL) brings world-class expertise to our nation’s most critical defense, security, space and science challenges. While we are dedicated to solving complex challenges and pioneering new technologies, what makes us truly outstanding is our culture. We offer a vibrant, welcoming atmosphere where you can bring your authentic self to work, continue to grow, and build strong connections with inspiring teammates.


At APL, we celebrate our differences and encourage creativity and bold, new ideas. Our employees enjoy generous benefits, including a robust education assistance program, unparalleled retirement contributions, and a healthy work/life balance. APL’s campus is located in the Baltimore-Washington metro area. Learn more about our career opportunities at

About Us

APL is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, creed, color, religion, sex, gender identity or expression, sexual orientation, national origin, age, physical or mental disability, genetic information, veteran status, occupation, marital or familial status, political opinion, personal appearance, or any other characteristic protected by applicable law.


APL is committed to promoting an innovative environment that embraces diversity, encourages creativity, and supports inclusion of new ideas. In doing so, we are committed to providing reasonable accommodation to individuals of all abilities, including those with disabilities. If you require a reasonable accommodation to participate in any part of the hiring process, please contact Only by ensuring that everyone’s voice is heard are we empowered to be bold, do great things, and make the world a better place.

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