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 diverse team of problem solvers as we add new chapters to the history of spaceflight! 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. At Blue Origin, we are a diverse team of collaborators, doers, and problem-solvers who are relentlessly committed to a culture of safety. This position will directly impact the history of space exploration and will require your dedication and attention to detail towards safe and repeatable space flight. Join us in lowering the cost of access to space and enabling Blue Origin's vision of millions of people living and working in space to benefit Earth. As part of a diverse, 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 8+ years proven experience in the design, development, and/or transient analysis of reactor systems (level commensurate on experience) 5+ years of experience overseeing, guiding, and mentoring less experienced engineers Highly knowledgeable of reactor modeling and simulation Knowledgeable of space nuclear systems Working knowledge of thermodynamics, flu