Mechanical Design Engineer

Company DescriptionHadron Energy specializes in Micro Modular Reactor (MMR) development, design, and research based in the San Francisco Bay Area. As a leading MMR developer, Hadron Energy is designing factory-produced, transportable microreactors that provide 24/7 carbon-free power for data centers, government facilities, industrial sites, and remote communities. Our mission is to create a brighter, healthier, and more equitable energy future.

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Mechanical Design Engineer – Balance of Plant (BOP) – Role DescriptionThis is a full-time remote role for a Mechanical Design Engineer – Balance of Plant (BOP), based in the United States. The position is ideal for candidates with strong mechanical design experience in power generation, thermal-fluid systems, and industrial equipment who are passionate about developing advanced nuclear energy systems.
The Mechanical Design Engineer – Balance of Plant will be responsible for the design, specification, integration, and optimization of major Balance of Plant equipment supporting Hadron Energy’s micro modular reactor platform. Working closely with the System Design Engineer – Balance of Plant, this individual will focus on the detailed engineering and technical oversight of key power conversion and heat rejection equipment, including turbine generators, air-cooled condensers, heat exchangers, pumps, and auxiliary mechanical systems.
You will collaborate with reactor engineers, thermal-hydraulic analysts, electrical engineers, vendors, and external engineering partners to develop efficient, reliable, and cost-effective plant systems that support commercial deployment objectives and future manufacturing scalability.
ResponsibilitiesLead the mechanical design, specification, and integration of major Balance of Plant equipment and systemsDevelop equipment specifications and design requirements for turbine generators, air-cooled condensers, heat exchangers, pumps, valves, and auxiliary systemsPerform mechanical evaluations, sizing calculations, equipment selection studies, and performance assessmentsCoordinate with thermal-hydraulics and system design engineers to ensure proper integration of mechanical equipment into overall plant architectureDevelop and review equipment layouts, general arrangements, piping interfaces, and equipment support conceptsSupport vendor selection, technical evaluations, bid reviews, and procurement activitiesProvide engineering oversight for substantial subcontracted equipment design and engineering scopeReview supplier calculations, equipment drawings, technical reports, and manufacturing documentationConduct trade studies to improve efficiency, reliability, maintainability, constructability, and lifecycle costSupport development of P&IDs, equipment lists, system descriptions, and engineering documentationCollaborate with licensing, safety, structural, and manufacturing teams to ensure compliance with project requirementsParticipate in design reviews, equipment qualification activities, testing programs, and startup planning effortsIdentify opportunities for simplification, standardization, modularization, and cost reduction across Balance of Plant systems
Qualifications & SkillsetsBachelor's, Master's, or PhD in Mechanical Engineering, Nuclear Engineering, or a related discipline5+ years of experience in mechanical design, equipment engineering, xzbcwsv or power generation systemsStrong experience with turbine generators, condensers, heat exchangers, pumps, cooling systems, or similar industrial equipmentKnowledge of thermodynamics, heat transfer, fluid mechanics, and power conversion systemsExperience developing equipment specifications and managing vendor-supplied equipment packagesProficiency with CAD software such as SolidWorks, Inventor, AutoCAD, or equivalent toolsFamiliarity with ASME codes, pressure boundary requirements, and industrial equipment design standardsExperience reviewing supplier designs, calculations, and technical documentationUnderstanding of power plant systems, industrial process systems, or nuclear plant Balance of Plant equipmentStrong analytical, technical writing, and communication skillsAbility to coordinate engineering activities across internal and external organizationsExperience supporting procurement, factory acceptance testing (FAT), and equipment qualification activities is highly desirablePassion for clean energy, innovation, and developing practical engineering solutions for advanced nuclear deployment