Senior Nuclear Engineer - Formulation

Senior Nuclear Engineer

• Formulation Blue Origin life insurance, parental leave, paid time off, paid holidays, 401(k) United States, Washington, Seattle Apr 23, 2026 Application close date: Applications will be accepted on an ongoing basis until the requisition is closed.

At 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 Advanced Concepts and Enterprise Engineering (ACE), supporting Blue Origin's mission of millions of people living and working in space for the benefit of Earth. The team fosters innovation and drives engineering workflows of the future, shared solutions and standards, simplicity and lower costs, and manufacturable design. This position is part of the Space Systems Development (SSD) business unit. SSD develops next-generation concepts and systems to advance our future of living and working in space sustainably. As part of a passionate, and hardworking team of engineers, you will help define the nuclear portfolio of propulsion and power systems for in space and lunar applications. You will help guide multi-disciplinary teams to align the engine and power system architecture with customer and company strategies, products, and technology maturation plans. If you are adept at managing to a plan, comfortable responding to evolving requirements or external constraints, and prioritizing efforts all the while infusing and facilitating creativity and innovation, you will share in the team's impact on all aspects of vehicle development and verification. Responsibilities include but are not limited to: Working with emerging and existing advanced concept program organizations to distill high level requirements into power and rocket propulsion system derived requirements Trading engine and power nuclear reactor systems and components, working fluid choices, system configurations, power generation, and overall reactor components for the best overall, optimized solution with assessments of mass properties and historically based cost estimates Working closely with systems and component design engineers to rapidly assess conceptual designs, perform system trade studies, develop integrated design solutions, formulate system margin strategy and performance parameters Assessing needs to onramp lower TRL technologies, and the respective cost and risk benefits Maturing and publishing the system-level reactor architecture, such as material and thermodynamic states, operational modes, functional flow block diagrams, and data flows Developing and maturing Level 1 reactor engine and power system requirements and verification methodologies as well as risk assessments, collaborating with the Systems Engineering organization Work with reactor, engine and component test groups to develop test and risk reduction plans Perform mission analysis with a reactor propulsion and power generation focus, flying the vehicle/stage/spacecraft across the mission concept of operations to optimize engine and power design characteristics, and determine failure modes Coach, mentor and technically assist other engineers Represent the program and company in technical discussions with external customers

Minimum Qualifications:

Passion for Blue Origin's mission: Millions of people living and working space for the benefit of earth! Minimum of a B.S. degree in nuclear engineering or equivalent technical field 5+ years proven experience in the design, development, and/or transient analysis of reactor systems (level commensurate on experience) 2+ years of experience overseeing, guiding, and mentoring less experienced engineers Knowledgeable of reactor modeling and simulation Knowledgeable of space nuclear systems Working knowledge of thermodynamics, fluid dynamics, and heat transfer Ability to lead and work effectively in teams Ability to be self-directed and balance several tasks at one time Ability to communicate analysis results effectivity

Preferred Qualifications:

M.S. or Ph.D. in engineering discipline Knowledge of nuclear thermal propulsion systems and in-space nuclear electrical power generation systems Knowledge of reactor system development and test Knowledge of how to create generalized point kinetic model of reactor designs, Monte Carlo methods for nuclear analysis, nodal diffusion codes and/or other reactor analysis codes. Reactor design, optimization, design automation, data visualization, coupled fluid flow, heat conduction, solid mechanics, neutronics and system behaviors for propulsion and power system solutions. Proficient with modeling tools and scripting languages such as MATLAB/Simulink, ROCETS, Amesim, or similar Experience with proposal support (technical/management volumes, Task Description/Basis-of-Estimate development, etc.) Experience working with U.S. Government research agencies (e.g.

NASA, AFRL, DARPA, DOE, INL

) Experience with fault-tolerance strategies and architectures for safety and mission-critical systems Experience developing requirements, defining subsystem interfaces (both in-house and between external partners/suppliers), and other systems engineering products and practices Experience across the product life cycle (pre-conceptual design through field support) Compensation Range for: CA applicants is $145,188.00

• $203,263.20 CO applicants is $133,500.00
• $186,898.95 WA applicants is $145,188.00
• $203,263.

20 Other site ranges may differ Culture Statement 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 Check Required for all positions: Blue's Standard Background Check Required 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 (CDL drivers only), 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 Benefits Benefits include: Medical, dental, vision, basic and supplemental life insurance, paid parental leave, short and long-term disability, 401(k) with a company match of up to 5%, and an Education Support Program.

Paid Time Off:

Up to four (4) weeks per year based on weekly scheduled hours, and up to 14 company-paid holidays. Dependent on role type and job level, employees may be eligible for benefits and bonuses based on the company's intent to reward individual contributions and enable them to share in the company's results, or other factors at the company's sole discretion. Bonus amounts and eligibility are not guaranteed and subject to change and cancellation. Please check with your recruiter for more details. Equal Employment Opportunity Blue Origin is proud to be an Equal Opportunity/Affirmative Action Employer and is committed to attracting, retaining, and developing a highly qualified and dedicated work force. Blue Origin hires and promotes people on the basis of their qualifications, performance, and abilities. We support the establishment and maintenance of a workplace that fosters trust, equality, and teamwork. We provide all qualified applicants for employment and employees with equal opportunities for hire, promotion, and other terms and conditions of employment, regardless of their race, color, religion, sex, sexual orientation, gender identity, national origin/ethnicity, age, physical or mental disability, genetic factors, military/veteran status, or any other status or characteristic protected by federal, state, and/or local law. Blue Origin will consider for employment qualified applicants with criminal histories in a manner consistent with applicable federal, state, and local laws, including the Washington Fair Chance Act, the California Fair Chance Act, the Los Angeles Fair Chance in Hiring Ordinance, and other applicable laws. For more information on "Know Your Rights," please see here. Affirmative Action and Disability Accommodation Applicants wishing to receive information on Blue Origin's Affirmative Action Plans, or applicants requiring a reasonable accommodation in order to participate in the application and/or interview process, please contact us atEEOCompliance@blueorigin.com. Please note this is a publicly managed inbox. Please do not include any personal medical information in your request. California Applicant Privacy Notice If you are a California resident, please reference the CA Applicant Privacy Notice here.