Senior Test Engineer (Mechanical/Fluids)

Join Radiant, a pioneering company in nuclear microreactor technology. As a Senior Test Engineer, you will drive mission-critical test operations, collaborate with a multidisciplinary team, and gain hands-on experience in a fast-paced production environment. You will contribute to test planning, execution, risk identification, hardware integration, post-test inspections, data review, and hardware performance analysis. This position offers a unique opportunity to bridge engineering, operations, and human factors in a highly technical environment.

• Conduire les opérations de test pour le développement, la qualification et l'acceptation de la technologie des micro-réacteurs nucléaires.
• Collaborer avec une équipe multidisciplinaire pour traduire des conceptions complexes en opérations de test claires et exécutables.
• Participer activement à la planification et à l'exécution des tests, à l'identification et à l'atténuation des risques, à l'intégration du matériel pour les campagnes de test.
• 5+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing
• Strong technical fundamentals in fluids and thermodynamics
• Strong written and verbal communication skills
• Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime)
• Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations
• Demonstrated ability to lead projects and work independently
• Flexible and adaptable mindset - self-driven with the ability to seek out requirements with minimal direction
• Bachelor’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline
• Prior experience working as an operator in fast-paced test environments (e.g., rocket engine testing, turbopump testing, component level testing), with familiarity in safety protocols, and high-reliability operations, high pressure gases, safety engineering (FMECAs, Keep-out Zone)
• Experience designing, fabricating, or operating fluid systems
• Knowledge of instrumentation including pressure transducers, thermocouples, resistance temperature detectors, and accelerometers
• Ability to read and interpret engineering standards, technical requirements, and engineering drawings (ASME 31.3, 31.1, and ASME Boiler Code Section III/VIII)
• Hands-on experience in developing technical procedures
• Experience reviewing test data and hardware performance analysis
• Proficiency with Ion, Epsilon3, NX CAD, Teamcenter
• Prior operations experience with hands-on work designing and commissioning test ground support equipment (test fixtures, fluid systems, electrical systems)
• Experience with Beckhoff PLC Controllers
• Must be willing to work extended hours and weekends as necessary to accomplish our mission
• Must work 100% onsite at El Segundo HQ