---
title: 'Director - Divertor and Plasma Material Interactions at Thea Energy'
canonical: 'https://feeny.ai/job/director-divertor-and-plasma-material-interactions-thea-energy-kearny-rjksbza2ekty'
type: 'job'
last_seen: '2026-11-04'
---

# Director - Divertor and Plasma Material Interactions at Thea Energy

- **Company:** Thea Energy
- **Location:** Kearny, NJ
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-11-03
- **Last confirmed live:** 2026-11-04
- **Apply:** https://jobs.lever.co/thea.energy/7f1ba61a-3e36-4163-b8ac-ce060ff48a42

## Job description

About Thea Energy: 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.

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.

## About Thea Energy

## Company Overview
- **One-liner**: Thea Energy is developing a simplified, economical stellarator fusion energy system using arrays of mass-manufacturable planar magnets and dynamic software controls.
- **Entity Type**: Private (Startup; founded in 2022)
- **Headquarters**: Kearny, New Jersey, USA
- **Founded**: 2022
- **Founders**: Founded with technology developed at Princeton University (specific founder names not publicly listed on main site).

## Core Business
- **Primary industry**: Fusion Energy / Clean Energy / Climate Tech
- **Target customers**: Utilities, grid operators, industrial energy users, and governments seeking baseload, zero-emission power generation.
- **Mission**: "To create a limitless source of zero emission energy for the future of humanity." [thea.energy](https://thea.energy/)

## Products & Services
- **Eos (Neutron Source Stellarator)**: A near-term commercial neutron source designed to achieve world-leading fusion performance and de-risk their first fusion power plant. [thea.energy](https://thea.energy/)
- **Helios (Fusion Power Plant)**: The company’s first planned full-scale fusion power plant, intended for commercial electricity generation. [thea.energy](https://thea.energy/)
- **Software-Defined Magnetics Platform**: The core technology differentiator—replacing complex, expensive 3D magnet coils with arrays of simpler, mass-manufacturable planar magnets controlled by a sophisticated software stack. This transfers hardware complexity into the digital realm. [thea.energy](https://thea.energy/)

## Market Standing
- **Valuation / Total Funding**: Not publicly disclosed.
- **Key Metric**: Private startup; notable for its technological breakthrough rather than public revenue. The company has active job postings (41 roles listed on Indeed) and is in a high-growth hiring phase. [indeed.com](https://www.indeed.com/cmp/Thea-Energy/about)
- **Notable Investors/Partners**: Announced a collaboration with **NVIDIA**, **Synopsys Inc**, **Argonne National Laboratory**, and **Princeton Plasma Physics Laboratory (PPPL)** to build the first digital twin of a stellarator fusion power plant using AI physics and engineering. [indeed.com](https://www.indeed.com/cmp/Thea-Energy/about)
- **Growth Signals**: Rapidly growing team; active hiring across engineering, supply chain, finance, and marketing roles; partnership with major tech and national lab players; progression from a science project (Eos) toward a commercial power plant (Helios).

## Competitive Advantages
- **Planar Magnet Arrays**: Replaces the prohibitively complex and expensive 3D coils of traditional stellarators with simple, mass-manufacturable planar magnets. This radically reduces cost and manufacturing complexity. [thea.energy](https://thea.energy/)
- **Software-First Approach**: Transfers the geometric complexity from hardware to a dynamic software control system, leveraging decades of progress in computing and controls to simplify the physical build. [thea.energy](https://thea.energy/)
- **Stellarator Advantage**: The stellarator is the only magnetic confinement system that creates all required fields with superconducting coils, enabling steady-state operation (no plasma disruptions), which is a key advantage over tokamaks. [thea.energy](https://thea.energy/)

## Strategic Focus
- **Commercialization of Eos**: Achieving near-term fusion performance and commercial operation with their neutron source stellarator.
- **De-risking Helios**: Using Eos as a stepping stone to validate technology and reduce risk for their first full-scale fusion power plant.
- **Digital Twin Development**: Leveraging AI and simulation (with NVIDIA, Synopsys, Argonne, PPPL) to accelerate design, operation, and optimization of their fusion systems.
- **Scaling the Organization**: Building out a multi-disciplinary team spanning fusion science, engineering, supply chain, and business functions.

## Why Work Here
- **Mission-Driven Work**: Opportunity to work on one of the biggest challenges facing humanity—creating limitless, zero-emission energy. [thea.energy](https://thea.energy/careers/)
- **Culture**: Described as dynamic, flexible, and adaptive, balancing strong individual autonomy with a collective team spirit. Employees are empowered to take ownership of their career growth. [thea.energy](https://thea.energy/careers/)
- **Diversity & Inclusion**: Explicitly committed to building a diverse workplace and encourages applications even if candidates don't meet every listed requirement. [thea.energy](https://thea.energy/careers/)
- **Work Model**: Roles are listed as **On-site** in Kearny, NJ (for most technical and corporate roles) and some internships. [jobs.lever.co/thea.energy](https://jobs.lever.co/thea.energy)
- **Benefits**: Competitive salaries, health benefits (medical/dental/vision), employee equity, 20 days PTO, paid holidays and sick time, paid parental leave, 401k, life and disability insurance, and office perks. [thea.energy](https://thea.energy/careers/)

## Sources
1. [thea.energy](https://thea.energy/)
2. [thea.energy/about-us](https://thea.energy/about-us/)
3. [thea.energy/careers](https://thea.energy/careers/)
4. [jobs.lever.co/thea.energy](https://jobs.lever.co/thea.energy)
5. [indeed.com](https://www.indeed.com/cmp/Thea-Energy/about)

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