Testing & Commissioning Engineer

We are looking for a Testing & Commissioning Engineer to join their engineering team in Shiga, Japan, supporting the testing, commissioning, and deployment of high-power gyrotron systems for advanced energy and nuclear fusion projects.

Key Responsibilities

• Develop test plans and detailed test procedures for high-power gyrotron systems, including test fixtures and measurement systems.
• Conduct Factory Acceptance Testing (FAT) at the company's facility in Shiga, Japan.
• Lead or support Site Acceptance Testing (SAT), commissioning, and equipment handover at domestic and overseas customer sites.
• Perform electrical and high-voltage measurements and evaluate equipment performance and operating conditions.
• Conduct millimeter-wave measurements including output power, frequency, mode patterns, reflected power, and arc detection.
• Perform conditioning operations across high-voltage, vacuum, and cooling subsystems and optimize system operating sequences.
• Develop measurement and data acquisition systems and analyze test results to verify equipment performance.
• Support startup planning and safety design for new test facilities, including test ranges, beam dumps, shielding, and interlock systems.
• Investigate technical issues during testing and commissioning and identify root causes through measurement and on-site observation.
• Compile and analyze test data and prepare technical reports, test documentation, and commissioning records.

Requirements

• 3+ years of experience in testing and commissioning of industrial equipment, electrical systems, research equipment, or similar technical systems.
• Experience in project engineering for large-scale equipment from test planning through commissioning and handover.
• Experience preparing test plans, test procedures, examination guidelines, technical reports, and commissioning documentation.
• Experience with electrical measurement, high-voltage equipment, measurement systems, or data acquisition.
• Experience designing or operating measurement systems and analyzing test data.
• Ability to troubleshoot technical issues and identify root causes using measurement and observation.
• Willingness and ability to travel domestically and internationally for commissioning activities.
• Intermediate English proficiency with the ability to read and write technical documentation and participate in technical discussions and meetings in English.

Preferred Qualifications

• Experience with millimeter-wave or microwave measurement systems.
• Experience with high-voltage, vacuum, cooling, or other complex equipment conditioning operations.
• Knowledge of Design of Experiments (DoE) and statistical data analysis.
• Knowledge of interlock and safety system design, including IEC 61508 or similar standards.
• Experience with thermal imaging or infrared thermography.
• Knowledge of Japan's Radio Act, RF exposure protection guidelines, or electrical installation standards.
• Experience in nuclear, fusion, power generation, research facilities, or advanced energy projects.
• Chief Electrical Engineer or Radiation Protection Supervisor certification.
• Japanese language proficiency at JLPT N3 level or above.Ideal Candidate:
• Strong technical and analytical background in testing, commissioning, measurement, or project engineering.
• Curious about understanding equipment behavior through measurement and on-site observation.
• Strong troubleshooting and root-cause analysis capabilities.
• Safety-conscious and capable of developing clear, practical, and reliable test procedures.
• Comfortable working with customers, suppliers, and multidisciplinary engineering teams.
• Willing to travel internationally and work at customer sites.
• Passionate about contributing to the commercialization of nuclear fusion and advanced energy technologies.