Process Engineer

Description

You will work closely with multidisciplinary teams—including mechanical, nuclear, and controls engineers—to translate conceptual designs into optimized, manufacturable process systems. This role offers the opportunity to directly influence the efficiency, reliability, and scalability of Hadron’s reactor platform in a fast-paced, innovation-driven environment.

The Process Engineer will play a key role in developing and refining the process systems that support Hadron Energy’s micro modular reactor (MMR) technology. This includes modeling thermal, hydraulic, and chemical processes across the plant; designing heat transfer and fluid systems; and ensuring efficient integration between the reactor, balance-of-plant, and auxiliary systems.

• Model and analyze thermal-fluid systems, including coolant loops, heat exchangers, condensers, and auxiliary processes
• Develop and validate steady-state and transient process simulations using tools such as Aspen HYSYS, COMSOL, ANSYS Fluent, or Modelica
• Perform process hazard analyses (PHAs) and participate in design and safety reviews
• Prepare documentation, calculations, and reports to support internal reviews and regulatory submissions
• Conduct mass and energy balance calculations to optimize system efficiency and safety margins
• Support component specification and procurement for pumps, valves, instrumentation, and heat exchangers
• Develop process flow diagrams (PFDs) and piping and instrumentation diagrams (P&IDs) for key reactor and plant subsystems
• Collaborate with the Balance of Plant and Mechanical Engineering teams to ensure cohesive system integration
• Support prototype testing, commissioning, and data collection activities for process validation
• Design and evaluate system configurations for heat transport, power conversion, and water/steam handling

Requirements

This is a full-time on-site role for a Process Engineer, based in the San Francisco Bay Area. The position is ideal for candidates with strong analytical, systems, and thermal-fluid backgrounds who are passionate about designing, optimizing, and scaling advanced energy systems.

• Bachelor’s or Master’s degree in Chemical Engineering, Mechanical Engineering, Nuclear Engineering, or a related field
• Experience designing or analyzing thermal-fluid systems such as coolant loops, heat exchangers, or pressure vessels
• Strong proficiency in process modeling and simulation software (e.g., Aspen HYSYS, RELAP5, COMSOL, or equivalent)
• 5+ years of experience in process engineering, thermal systems design, or power generation
• Familiarity with ASME codes, P&ID development, and process safety standards
• Excellent analytical, organizational, and technical communication skills
• Ability to work cross-functionally and manage multiple priorities in a dynamic startup environment
• Knowledge of heat transfer, thermodynamics, and fluid mechanics principles applied to high-efficiency energy systems
• Understanding of nuclear or advanced energy system processes is a plus

Benefits

Training + Development

Interview process

Visa Sponsorship

Security clearance