Full-Time

Mechanical Engineer

Thea Energy

Thea Energy

51-200 employees

Develops modular fusion power plants

Compensation Overview

$85k - $150k/yr

+ Equity Stock Options

Newark, NJ, USA

In Person

Category
Mechanical Engineering (2)
,
Required Skills
GD&T
SolidWorks
FEM/FEA
Requirements
  • Minimum of a bachelor’s degree in mechanical engineering, aerospace engineering, physics, or related fields
  • Experience designing, building, and commissioning custom systems
  • Experience in mechanical engineering using CAD software (e.g. Solidworks, CATIA, NX, etc.)
  • Experience specifying machining, welding, and/or fabrication requirements
  • Ability to decompose and solve complex problems
  • Ability to take initiative and guide the design and analysis of complex components and systems with the aid of peers and team members
  • Ability to execute and flourish in a fast-paced, rapidly changing environment
  • Familiarity with GD&T (ASME Y14.5) & Drawing Standards
  • Comfortable working to aggressive deadlines
  • Exceptional work ethic
  • Strong team member with clear communication and collaboration skills
Responsibilities
  • Contribute to the design and development of primary and secondary mechanical fusion components and subsystems
  • Produce mechanical engineering designs, drawings, specifications, and parameters from first principals with appropriate tolerances for vendor quoting and manufacturing
  • Design tooling for assembly
  • Perform thermal, structural, and electromagnetic analysis and simulation using Ansys and COMSOL
  • Incorporate design for manufacturing principles and support first builds
  • Support the implementation of tooling and manufacturing
  • Design and execute qualification testing
  • Communicate and collaborate with internal and external stakeholders

Thea Energy develops modular, utility-scale fusion power systems based on advanced stellarator designs from Princeton and other researchers. Its core product is a net-energy generating stellarator plant that is designed, built, and operated for utility-scale electricity generation and delivered to grid operators. The company focuses on simpler, lower-cost modular stellarator units and an end-to-end service model that covers design, construction, and long-term operation. Its goal is to provide a reliable, zero-emission energy source that can scale to meet demand and reduce global carbon emissions.

Company Size

51-200

Company Stage

Series A

Total Funding

$20M

Headquarters

Princeton, New Jersey

Founded

2022

Simplify Jobs

Simplify's Take

What believers are saying

  • Eos operational by 2030 produces tritium and medical radioisotopes for revenue.
  • DOE Milestone-Based Fusion Development Program provides non-dilutive funding through 2028.
  • $20M Series A from Prelude Ventures funds superconducting magnet systems development.

What critics are saying

  • Type One Energy advances faster in DOE program, capturing larger funding share.
  • Commonwealth Fusion Systems and Helion achieve net energy ahead of stellarators.
  • Eos sub-breakeven deuterium plasma may fail to generate promised radioisotope revenue.

What makes Thea Energy unique

  • Planar coil architecture eliminates complex 3D magnets, reducing manufacturing costs significantly.
  • Software-based plasma control transfers complexity from hardware to computational systems.
  • Eos neutron source generates near-term revenue while de-risking Helios power plant.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Stock Options

Paid Vacation

Growth & Insights and Company News

Headcount

6 month growth

1%

1 year growth

2%

2 year growth

4%
OODA Loop
Oct 7th, 2025
Thea Energy advances with $30M funding

Thea Energy, a Kearny-based company, is advancing its fusion power goals with significant backing, including a recent fellowship from Amazon Web Services and the International Research Centre on Artificial Intelligence. A spinout from Princeton Plasma Physics Laboratory and Princeton University, Thea Energy focuses on commercializing stellarator fusion energy. Since its 2022 founding, the company has raised $30 million in investor funding and received additional non-dilutive funding from the U.S.

TechCrunch
Feb 8th, 2024
Thea Energy Raises $20M Series A For Pixel-Inspired Fusion Power Plants

To build a fusion power plant, engineers are forced to make some difficult choices. Do they go with the simpler design and then, while in operation, force the plasma to behave so it doesn’t snuff itself out? Or do they opt for a complex design that’s challenging to build but leads to happier plasma?Or what if there was a way to do both?Thea Energy is hoping that “both” is the right answer. The startup is betting that software can supplant manufacturing precision in its quest to deliver reliable, inexpensive fusion power. It has recently raised a $20 million Series A, TechCrunch has exclusively learned. Prelude Ventures led the round with participation from 11.2 Capital, Anglo American, Hitachi Ventures, Lowercarbon Capital, Mercator Partners, Orion Industrial Ventures and Starlight Ventures.There are two main approaches to fusion power: inertial confinement and magnetic confinement. The former made headlines at the end of 2022 for proving that net-positive fusion power isn’t just science fiction by using massive lasers to vaporize a fusion fuel pellet.Many startups, though, are using some variation of the former

Reuters
May 31st, 2023
US announces $46 million in funds to eight nuclear fusion companies

Eight U.S. companies developing nuclear fusion energy will receive $46 million in taxpayer funding to pursue pilot plants attempting to generate power from the process that fuels the sun and stars, the Department of Energy said on Wednesday.