Senior Mechanical Engineer, Diagnostics

As a Diagnostics Engineer on the Science team at Helion, you will help advance the design and development of next-generation diagnostic instrumentation that supports our mission to achieve fusion energy. Sitting at the intersection of mechanical design, prototyping, and scientific exploration, you'll transform early-stage concepts into robust mechanical systems that enable groundbreaking plasma diagnostics and research. This is an onsite role that reports directly to the Director of Experimental Science at our Everett, WA office.

Collaborate with interdisciplinary teams that include scientists, engineers, and product designers, to develop novel mechanical solutions for experimental diagnostic devices

Own the mechanical design of diagnostic systems: define and refine requirements, troubleshoot hardware issues, and drive continuous improvements

Design, prototype, and iterate mechanical components and assemblies using CAD tools (e.g., NX, SolidWorks); perform structural and thermal analysis (e.g., ANSYS); and lead design reviews

Conduct experimental testing, collect and analyze performance data, and support root-cause analyses of mechanical failures or performance deviations

Apply lessons from historical designs, develop innovative hardware, and integrate your solutions into ongoing fusion research experiments

Continuously expand your skills and domain knowledge by learning from Helion’s technical experts and engaging with cutting-edge science and engineering