Pmi Engineering Designer Jobs (NOW HIRING)

Thea Energy is leveraging recent breakthroughs in stellarator physics and engineering to create a faster and simpler approach to commercializing fusion energy. The company is reinventing the stellarator using computer-controlled arrays of planar coils thereby replacing the intricate, complex modular magnets required in all other stellarator architectures. Thea Energy is on a mission to create a limitless source of zero emission energy for a sustainable future.

We are seeking an experienced Plasma-Material Interaction (PMI) Manager to lead the development of high-performance plasma-facing materials and components (PFCs) for our Eos and Helios stellarators. In this role, you will bridge plasma physics, materials engineering, and component integration to address high heat-flux management, surface erosion, and hydrogen isotope retention in quasi-axisymmetric, planar-coil stellarator architectures. You will direct in-house experimental campaigns, oversee specialized test facilities, and manage key external research and procurement partnerships to de-risk wall environments for steady-state fusion operations.

• Direct the research, design, and qualification of plasma-facing materials—including first-wall armor and divertor target materials for Eos and Helios stellarators.
• Oversee the preparation, execution, and analysis of PMI experiments on the Eos stellarator and dedicated in-house test facilities.
• Act as the technical lead for external collaborations with national laboratories, university research groups, and commercial vendors for material synthesis, neutron irradiation testing, surface diagnostics, and PFC component procurement.
• Lead the computational efforts to simulate erosion, redeposition, and thermal shock degradation in real time.
• Work closely with mechanical design and physics modeling teams to translate PMI simulation and experimental data into validated inputs for plasma transport and engineering designs.

• Education: Ph.D. in Materials Science, Plasma Physics, Nuclear Engineering, Mechanical Engineering, or a closely related discipline.
• Experience: 8+ years of technical experience in plasma-surface interactions, high-temperature materials, or magnetic confinement fusion engineering, with at least 3+ years managing technical projects or multidisciplinary teams.
• Technical Expertise:
  • In-depth understanding of edge plasma dynamics, sputtering, redeposition, helium ash/hydrogen isotope retention, and high heat flux behavior.
  • Practical experience designing, building, or operating plasma-facing test rigs or boundary diagnostics on magnetic confinement devices (stellarators or tokamaks).
  • Strong knowledge of materials testing, characterization methods, and procurement workflows for high-temperature and plasma-exposed materials.
• Leadership & Communication: Track record of driving complex R&D initiatives, managing external vendor and research contracts, and working against tight engineering deadlines.

• Direct exposure to fusion plasma physics, stellarator configurations, or fusion plasma divertor concepts such as X-point divertors.

• Experience with computational modeling tools, including coupled plasma-transport and surface kinetics codes (SOLPS, UEDGE, EMC3-EIRENE, ERO2.0, WallDYN), BCA tools (SDTrimSP, RustBCA, TRIM), and FEA thermomechanical software (ANSYS, COMSOL).

• Salary range $130,000-$165,000
• Comprehensive health benefits (e.g. medical/dental/vision)
• Employee equity stock options
• 20 days PTO

Thea Energy is an equal opportunity employer committed to creating a company of diverse backgrounds. By creating a diverse environment, we will bring new ideas and approaches to solving some of the world’s hardest (and most important) problems. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender, sexual orientation, gender identity or expression, national origin, family or marital status, age, disability, veteran’s status, or other characteristic protected by applicable laws and regulations.