As a Senior Test Engineer, you will be working in the civil nuclear & aerospace industry leading the design, development, and execution of test strategies to validate products, systems, and manufacturing processes, serving as a technical authority and process leader to ensure reliable, accurate, and cost-effective testing while supporting cross-functional engineering goals, resolving performance issues, and mentoring junior test staff. Execute rigorous environmental stress test programs that simulate normal operational and accident conditions, including accelerated thermal aging, radiation aging, seismic/vibration simulation, mechanical shock, humidity, and chemical spray.