SpaceX veteran Tom Mueller on rocket engines and Impulse Space

Tom Mueller, a pioneering aerospace engineer, played a crucial role in the rise of commercial spaceflight as SpaceX’s first employee and lead designer of its Merlin, Kestrel, and Draco rocket engines. His early passion for rockets and mechanical engineering led him to build the world’s largest amateur liquid-fuel rocket engine in his garage, which caught Elon Musk’s attention. At SpaceX, Mueller helped develop the propulsion systems that underpin the Falcon 9 rocket, a vehicle that has revolutionized space access by significantly lowering launch costs through reusability and enabling the return of astronaut launches to the U.S. after the Space Shuttle’s retirement. After departing SpaceX in 2020, Mueller founded Impulse Space, focusing on in-orbit mobility—efficiently moving payloads once they are already in space, addressing the next major challenge in space transportation. Impulse has successfully flown three Mira spacecraft on Falcon 9 rideshare missions, demonstrating progress in this emerging sector. Mueller credits his time at Space