Propulsion Engineer, Engine Cooling & Air Systems

Propulsion Engineer, Engine Cooling & Air Systems About this position

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

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 expertise in heat transfer, internal aerodynamics, compressible flow, mechanical design, or structural analysis — and grow into the SAS discipline under senior engineers who 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 hard to find pre‑trained talent, so we’re hiring differently for this role. We’re not requiring existing SAS experience. What we want 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 seniors.

You’ll be part of a small, high‑performance propulsion engineering team building a new 21st‑century engine manufacturer from the ground up, using modern tooling and a bias toward action.

• 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 help integrate the needs of multiple disciplines such as aero, thermal, structure, and durability in the engine
• Develop and integrate tool chains and processes, including multidisciplinary 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!

• Bachelor’s or Master’s in Mechanical, Aerospace, or related engineering
• Proficiency in Python or similar programming languages
• Drive to develop an expertise in engine secondary air systems engineering on a turbofan architecture
• Ability to navigate through CAD to support module integration efforts in the engine
• Background in developing design tools, methods, or processes
• Testing and data‑reduction experience
• Willingness to both speak and listen, give opinions, receive opinions, consider all data, and build team consensus to move forward

• Component or module ownership experience in a turbo machinery program or product
• Experience in 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 or gas turbine engine architectures
• Experience with secondary air systems architecture and past development programs for in‑service turbo machinery
• Prior experience working with engine cycle analysis tools such as NPSS or Py Cycle
• Ability to dive deep into component‑level design and analysis
• Experience with Axstream or ADS turbo machinery software
• A strong desire to avoid bureaucracy and move fast in a dynamic environment

We’re hiring at multiple levels of experience—whether you’re early in your career or bring decades of design expertise, we’d love to hear from you.

• P2 Level – 0‑5 years of experience – Base salary range: $85,000 – $105,000
• P3 Level – 5‑10 years of experience – Base salary range:…