Joshua Holder Email & Phone Number

Seattle, Washington, United States

Researching applications of distributed optimization and reinforcement learning to satellite constellation optimization problems.Developed lectures, held office hours and answered student questions in the following courses.AA 310 (Orbital Mechanics)AA 516 (Stability and Control of Flight Vehicles, graduate level)AA 447 (Control in Aerospace Systems)

Hawthorne, California, United States

End-to-end development of several control algorithms to increase the autonomy and performance of current and next-generation satellite constellations.

Houston, Texas, United States

Developed flight software across the GN&C stack for the Orion spacecraft. Rewrote thrust allocation algorithm in 9 weeks, saving schedule, increasing performance, and winning NASA Shining Star Award for efforts.

Houston, Texas, United States

-Developed novel control algorithms for autonomous underwater vehicle (AUV) which can adjust its buoyancy dynamically-Developed bang-bang control scheme in C++ utilizing both hard and soft actuators to reduce fuel consumption by 75%-Led test campaign to characterize performance of control schemes on actual hardware-Created a 6DOF animation environment to.

Houston, Texas, United States

-Developed several tools for visualizing the health of and interacting with the Orion control system in flight using python and NASA-specific coding languages-Streamlined process of reading flight procedures with Python automation, saving 60+ person hours-Completed multiple GN&C flight controller training courses-Gained invaluable insight into the.

Houston, Texas, United States

-Developed multiple critical control algorithms in C++ to be used in Orion backup flight software-Developed method for tracking fuel consumption based on propellant pressure, accurate within 5% based on analysis-Used stability margin analysis to design Orion PID controller, identifying appropriate PID gains for system stability-Attained special achievement.

Houston, Texas Area

-Analyzed loading on Lunar Gateway structure during docking utilizing custom NASA fluid dynamics code and high-performance-computing resources-Updated and streamlined structural analysis process using Python and Bash, increasing process efficiency by >50%-Developed multiple tools in Python capable of interactively creating and editing plots to identify.

Baltimore, Maryland Area

Independently led effort to design, analyze, and fabricate test fixture for mission critical SM3-Block II component-Modeled part in Creo 4.0 and conducted FEA in Abaqus to verify performance in test environment-Used GD&T principles and hands-on machining skills to fabricate the fixture on a tight deadline-Prepared data acquisition systems for test.

Master Of Science - Ms, Aerospace, Aeronautical And Astronautical Engineering

Fully-funded research scholarship (NSF Graduate Research Fellow, Boeing Fellow)

Bachelor Of Science - Bs, Mechanical Engineering, Graduated Phi Beta Kappa, Summa Cum Laude, Most Outstanding Mech Senior