Senior Propulsion Engineer, Secondary 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. Start the Best Work of Your Career at Boom At Boom, our remarkably small team built the groundbreaking XB-1 supersonic jet and designed the world's fastest airliner Overture. What made it possible? Exceptional people—driven, curious, and committed to building what’s never been built before. Now, we’re applying that same approach to Symphony—the first jet engine purpose-built for sustainable supersonic flight. It will be the fastest development of a large-scale propulsion system in aviation history, and our systems performance team is at the heart of it. As a Secondary Air Systems Engineer, you’ll work shoulder to shoulder with aircraft designers, systems leads, and test engineers to architect the way Symphony systems work—from concept through certification. You’ll design, optimize, and build the systems that make supersonic travel possible. And you’ll be there when it all comes together—when the Symphony prototype roars to life on the test stand this year, and takes flight just a few years from now. If you’re the kind of engineer who chases understanding, thrives in the unknown, and gets energy from building what’s never been built—you’ll fit right in. Role Overview As part of the Propulsion Team, you will: Lead the Secondary Air Systems engineering for the Symphony turbofan engine Take ownership of 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 Symphony 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 Symphony engine development and Overture propulsion system integration, including fabrication and testing. Bring your curiosity! Ideal Candidate Bachelor’s or Master’s in Mechanical or Aerospace Engineering or related field Proficiency in Python or similar programming languages Significant experience as an engine secondary air systems engineer working on a turbofan architecture Demonstrated experience in developing whole engine 1D flow networks for gas turbines in software such as Altair/GE Flow Simulator, thermal desktop, etc. Experience in leading whole engine model creation and execution Experience in correlating engine test data to calibrate heat transfer models for whole engine modeling In-depth knowledge of different seal configurations applicable to modern turbofan architectures Ability to clearly think through and communicate coupled engine and aircraft system level interactions Ability to navigate through CAD to support module integration efforts in the engine Willingness to both speak and listen, to give opinions and receive opinions, to consider all the data and be part of building the team consensus to move forward What Will Set You Apart Component or module ownership experience in a turbomachinery program or product Experience with secondary air systems architecture and past development programs for in-service turbomachinery Prior experience working with engine cycle analysis tools such as NPSS or PyCycle Supersonic jet engine design experience Part 33 commercial certification experience Ability to dive deep into component-level design and analysis Background in developing design tools, methods or processes Testing and data-reduction expe