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Position Overview

Thea Energy is seeking a Director - Divertor and Plasma Material Interactions to lead the research, design, engineering, prototyping, and qualification of Thea Energy's divertor and first-wall systems across both the Eos and Helios development programs. This leader will lead an interdisciplinary team that will advance the technical basis for device design of three tightly coupled areas:

• Core-edge integration

• Plasma edge and divertor physics

• Plasma material interactions (PMI)

As part of a rapidly growing team, you'll be part of the organizational build-up of a leading

fusion energy company. This role will have a high degree of autonomy and must be able to

move quickly to resolve technical issues in a timely manner.

Key Responsibility Areas

Strategic Leadership & Program Execution

• Own the technical roadmap and milestones for core-edge optimization, heat exhaust solutions, plasma-facing systems, and particle exhaust subsystems from pre-conceptual design through hardware fabrication and operational commissioning.
• Lead and mentor a world-class team of edge-plasma physicists, materials scientists, and thermal-mechanical engineers.
• Set budget, staffing, and vendor strategies, balancing rapid in-house prototyping with key institutional partnership

Divertor Design & Boundary Physics Integration

• Direct the physics and engineering design of the world's first planar-coil stellarato X-point divertor, managing heat fluxes exceeding 10 MW/m2 under steady-state operation.
• Oversee comprehensive SOL and edge transport modeling using industry-standard codes to predict strike-point heat flux profiles, detachment dynamics, impurity transport, and neutral pumping efficiency.
• Establish active boundary control schemes using magnetic shaping coils and localized gas/impurity puffing to ensure robust radiative detachment and protect divertor targets.

Plasma-Material Interactions & Advanced Materials Qualification

• Direct development of the technical basis for plasma facing material selection for long-pulse, low-core-fuel dilution operation on Eos and Helios.
• Lead research initiatives into novel PFC solutions, such as renewable boundary surfaces, liquid metals, or aggregate pebble concepts where appropriate for longterm power plant life cycles.
• Formulate testing campaigns for plasma erosion, sputtering, blistering, and helium/deuterium/tritium retention, both with and without sustained neutron fluence.

Ideal Experience & Skillsets

Education & Experience

• Ph.D. or Master's degree in Nuclear Engineering, Plasma Physics, Materials Science, Mechanical Engineering, or a closely related discipline.
• 10+ years of direct experience in the design, development, or operation of plasmafacing components, divertor systems, or boundary physics in magnetic confinement fusion devices (tokamaks or stellarators)

Technical Expertise

• Deep domain knowledge in steady-state plasma exhaust physics, SOL transport, divertor detachment, and high-heat-flux engineering.
• Proven familiarity with edge/scrape-off layer simulation codes (e.g., EMC3-EIRENE, SOLPS, SOLEDGE) and FEA/CFD multiphysics tools (e.g., ANSYS, COMSOL) applied to extreme thermal and electromagnetic loads.
• Clear understanding of the operational trade-offs between physics performance (core purity, H-mode retention, low and engineering survivability (thermal margins, erosion lifetimes, remote replacement constraints).

Core Competencies

• Decisive technical judgment: ability to balance scientific rigor with the aggressive timelines of private fusion commercialization.
• Exceptional cross-disciplinary communication skills, with the ability to convey complex plasma-boundary trade-offs to hardware engineers, executives, and investors.

Preferred Qualifications

• Direct experience with stellarator magnetic topology (island divertors, nonaxisymmetric strike-lines) or advanced tokamak divertors (Super-X, snowflake, Xpoint target geometries).
• Demonstrated experience integrating diagnostic instrumentation (Langmuir probes, infrared thermography, bolometry, spectroscopy) into active plasma environments.

Company Benefits

• Salary range $165,000 - $230,000
• Comprehensive health benefits (e.g. medical/dental/vision)
• Employee equity stock options
• 20 days PTO

It's not necessary to meet all of the skillsets outlined above. Please feel free to send us a note and tell us why you would still be a great fit for this role or Thea Energy.

Diversity and Inclusion

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.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.