Propulsion Engineer II, Thermal Systems

Join Blue Origin's Engines Business UnitAt Blue Origin, we envision millions of people living and working in space for the benefit of Earth. We're working to develop reusable, safe, and low-cost space vehicles and systems within a culture of safety, collaboration, and inclusion. Join our team of problem solvers as we add new chapters to the history of spaceflight! This role is part of the Blue Origin Engines business unit, where our focus is the design, development, manufacturing, and testing of engines and propulsion systems. Built for multiple uses, our family of engines is powering the next generation of rockets for commercial, civil, national security, and human spaceflight. As part of a hardworking team of engineers, you will design, analyze, and optimize the next generation of heat exchangers for demanding thermal?fluid environments. You will work with cross?functional teams to develop innovative, high?effectiveness, low?pressure?drop thermal solutions and to mature them from concept through qualification. You will be responsible for defining heat exchanger cores, headers, manifolds, and assemblies to support fabrication, testing, and production. A successful candidate will apply their knowledge across multiple applications involving heat transfer between fluids and phases, demonstrating versatility and technical depth as designs advance through successive iterations. Responsibilities include but are not limited to: Lead design, development, and testing of heat exchangers and related thermal?fluid systems, driving successive design iterations toward improved effectiveness, cost, and manufacturability Develop system requirements, specifications, and design documentation for heat exchanger cores and assemblies Design and optimize heat exchanger geometries and components including cores, headers, manifolds, tube sheets, and mounting/support structures balancing thermal effectiveness against pressure drop, mass, and volume Select appropriate materials for applications considering thermal cycling, creep, fatigue, and corrosion resistance Create detailed engineering drawings and models using 3D CAD software with proper GD&T per ASME Y14.5 standards Lead and participate in component and system?level testing, including test planning, execution, and thermal/hydraulic data reduction and correlation to analytical predictions Troubleshoot design and operational issues (e.g., thermal stress, flow maldistribution, fouling, leakage) with calculated risk assessment Collaborate with manufacturing and quality teams to ensure producibility of designs, including brazed, welded, and additively manufactured cores Interface with various engineering disciplines to ensure proper thermal and system integration

Familiarity with relevant industry standards and codes (ASME BPVC, TEMA, API, etc.)Must be a U.S. citizen or national, U.S. permanent resident (current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum.

Don't meet all desired requirements? Studies have shown that some people are less likely to apply to jobs unless they meet every single desired qualification. At Blue Origin, we are dedicated to building an authentic workplace, so if you're excited about this role but your past experience doesn't align perfectly with every desired qualification in the job description, we encourage you to apply anyway. You may be just the right candidate for this or other roles. Export Control Regulations Applicants for employment at Blue Origin must be a U.S. citizen or national, U.S. permanent resident (i.e. current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum. Background CheckRequired for all positions: Blue's Standard Background CheckRequired for Certain Job Profiles: Defense Biometric Identification System (DBIDS) background check if at any time the role requires one to be on a military installation Required for Certain Job Profiles: Drivers who operate Commercial Motor Vehicles with a Gross Vehicle Weight (GVW), Gross Vehicle Weight Rating (GVWR) or combination of power unit and trailer that meets or exceeds 10,001 lbs. and/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing, vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. Required for certain Job Profiles: Ability to obtain and maintain Merchant Mariner Credential, which includes pre-employment and random drug testing as well as DOT physical