Process Engineer (Site Engineer)

We are looking for a Process Engineer / Site Engineer to join engineering team in Tokyo, Japan, supporting the development, engineering, installation, commissioning, and operation of advanced energy and nuclear fusion facilities.

Key Responsibilities:

• Develop and update Process Flow Diagrams (PFDs) and Piping & Instrumentation Diagrams (P&IDs) for fusion plants and related test facilities.
• Develop process and operational designs with a strong focus on safe, reliable, and maintainable plant operation.
• Develop equipment and piping layouts considering installation procedures, maintenance access, inspection space, scaffolding, and overall workability.
• Coordinate installation and engineering activities with EPC contractors, site teams, suppliers, and other project stakeholders.
• Support testing, commissioning, startup, and operational activities for plant systems and test facilities.
• Coordinate with mechanical, process, control, electrical, materials, simulation, and other engineering disciplines to ensure effective plant integration.
• Review technical documentation and coordinate with EPC companies, suppliers, research institutions, and customers.
• Support overseas projects through technical discussions, engineering coordination, and customer support in English.
• Develop and review plant operating concepts, including startup, shutdown, and emergency procedures.
• Support troubleshooting and improvement activities during construction, commissioning, and plant operation.
• Evaluate plant design from the perspective of safety, operability, maintainability, and practical site execution.
• Contribute to the development and implementation of new technologies related to nuclear fusion and advanced energy systems.

Requirements:

• 3 years of experience in process engineering, process design, plant engineering, or related industrial engineering.
• Experience preparing and reviewing PFDs, P&IDs, process specifications, or similar engineering documents.
• Understanding of plant operation, including startup, shutdown, and emergency procedures.
• Experience with plant equipment, piping systems, layouts, or process systems.
• Experience coordinating with EPC contractors, suppliers, vendors, or site teams.
• Experience in testing, commissioning, construction, or site engineering is preferred.
• Ability to work across multidisciplinary engineering teams and understand the overall plant rather than only an individual discipline.
• Intermediate English proficiency with the ability to participate in technical discussions and communicate with international stakeholders.

Preferred Qualifications:

• Experience in oil & gas, refinery, petrochemical, chemical, power generation, nuclear, hydrogen, or other industrial/process plants.
• Chemical Engineering background or experience in chemical process engineering.
• Experience with heat exchangers, pumps, valves, piping systems, or other process equipment.
• Experience with process simulation or engineering analysis tools such as Aspen HYSYS, Aspen Plus, HTRI, ANSYS, or equivalent.
• Experience working with overseas vendors or international EPC projects.
• Experience in plant construction, commissioning, startup, or capacity expansion projects.
• Knowledge of nuclear energy, radiation-related applications, or fusion technology.
• Qualifications such as Radiation Protection Supervisor, Hazardous Materials Class A, High Pressure Gas Class A, Energy Manager, Boiler Engineer, Electrical Chief Engineer, or Pollution Prevention Manager.

Ideal Candidate:

• Strong process or plant engineering background with the ability to understand the entire plant and its operation.
• Practical, site-oriented mindset with an understanding of installation, commissioning, maintenance, and operational requirements.
• Strong analytical and problem-solving skills.
• Comfortable coordinating with EPC contractors, vendors, customers, and multidisciplinary engineering teams.
• Proactive and willing to learn new technologies, engineering approaches, and industries.
• Able to balance process performance, safety, operability, and maintainability.
• Passionate about contributing to the development and commercialization of nuclear fusion and future energy technologies.