Propulsion Engineer, Engine Cooling & Air Systems

Boom Supersonic’s mission is to make the world dramatically more accessible through a renaissance in supersonic flight. Boom is developing the Symphony supersonic engine, which powers the Overture supersonic airliner and the Superpower natural gas turbine for AI. Overture will fly at twice the speed of today’s subsonic jets over water and 50% faster over land with Boomless Cruise. Boom Supersonic’s mission is to make the world dramatically more accessible through a renaissance in supersonic flight. Boom is developing the Symphony supersonic engine, which powers the Overture supersonic airliner and the Superpower natural gas turbine for AI. Overture will fly at twice the speed of today’s subsonic jets over water and 50% faster over land with Boomless Cruise. Start the Best Work of Your Career at Boom Boom Supersonic is building the breakthrough Overture supersonic airliner and the Superpower natural gas turbine — machines that push the boundaries of physics, manufacturing, and industrial ambition. But aircraft and engines don't build themselves. The single most important variable in our success is a world-class team — people who are unusually talented, unusually driven, and willing to do what others won't even attempt. That's where you come in. Not a traditional engineering job As a Propulsion Engineer on Engine Cooling & Air Systems at Boom, you won't be executing prescribed analysis tasks within a rigid framework set in stone decades ago. You'll join our Secondary Air Systems (SAS) team as a thermal-fluids analyst, bringing your craft in heat transfer, internal aerodynamics, compressible flow, mechanical design, or structural analysis — and growing into the SAS discipline itself under senior engineers who will mentor you. Secondary Air Systems is one of the highest-leverage disciplines in a modern engine — it touches cooling, sealing, thrust loads, bearing life, and hot-section durability. It's also a discipline that's notoriously hard to find pre-trained talent for. That's why we're hiring differently for this role. We're not requiring existing SAS experience. What we are looking for is strong adjacent expertise — thermal analysis, internal aerodynamics, compressible flow, mechanical or structural design, or analysis tool creation — plus intense curiosity, learning aptitude, and the willingness to absorb the SAS discipline from the senior engineers who will mentor you. Bring your craft and your appetite to learn; we'll teach you SAS. You'll be part of a small, high-performance propulsion engineering team responsible for building one of the most ambitious hardware companies of this century. You'll be part of inventing a new 21st century engine manufacturer from the ground up, one that is built on modern tooling and a bias toward action. You won't be a cog in a machine. You'll be a trusted contributor doing real analysis work on a real engine — the Symphony turbofan that will power the Overture supersonic airliner — surrounded by senior engineers who will mentor your growth into deeper ownership. As part of the Propulsion Team, you will: Take ownership of the Secondary Air Systems engineering for the Superpower gas turbine engine Be responsible for the engine thermal management systems for secondary flows Provide inputs to a whole engine model, evaluate results, and recommend improvements Take on the big picture view of Superpower as a total system and be responsible for helping to integrate the needs of multiple disciplines such as aero, thermal, structure, and durability in the engine Develop and integrate toolchains and processes, including multi-disciplinary workflows and automation that fully integrate engine and propulsion analyses with airframe development Beyond these specific things, there are many opportunities to get involved in all aspects of the Superpower engine development, including fabrication and testing. Bring your curiosity! Ideal Candidate Bachelor’s or Master’s in Mechanical or Aerospace Engineering or re