📍
Carlsbad, CA

Sustainability intern

Internship
Energy & Climate
Product
Posted:
December 29, 2025

Thea Energy

Stellarator-based fusion power
63
Palpable Score
Apply >view company >

The Product Development Intern position at Thermo Fisher Scientific's Experience Design Center focuses on developing eco-friendly products. Work closely with senior engineers to integrate sustainability into product design, assess environmental impact, and help achieve net-zero emissions goals.

What will you do? (Responsibilities)

How will you get here? (Knowledge/Skills)

Start Date: This internship is set to begin on either May 11th or June 15th, 2026 for a duration of 10-12 weeks (dependent upon student availability per academic calendars).

Education & Experience

To qualify, applicants must be legally authorized to work in the United States and should not require sponsorship (current or future) for employment visa status. Thermo Fisher does not offer employment in this position to holders of F-1, J-1, H-1, OPT, and CPT Visas for the purpose of obtaining practical experience.

Compensation and Benefits

Compensation and Benefits

The hourly pay range estimated for this position based in California is $14.75–$28.75.

This position may also be eligible to receive a variable annual bonus based on company, team, and/or individual performance results in accordance with company policy. We offer a comprehensive Total Rewards package that our U.S. colleagues and their families can count on, which includes:

About the company

Thea Energy

Company overview
Thea Energy is a fusion technology company working on a stellarator-based approach to delivering carbon-free energy at scale. The company focuses on planar, programmable magnet arrays made with high-temperature superconductors, paired with software controls, to simplify stellarator hardware. Thea Energy’s near-term system is described as “Eos,” positioned as an integrated stellarator neutron-source system to de-risk a future fusion power plant concept (“Helios”). Thea Energy was founded in 2022 as a spin-out connected to Princeton Plasma Physics Laboratory and Princeton University.

Locations and presence

Thea Energy lists a headquarters and lab in Kearny, New Jersey, plus an office presence in Princeton, New Jersey. Most open roles and early-career internships are listed as on-site in Kearny, NJ, including internship postings that specify an on-site weekly expectation.

Palpable Score

63
/ 100
Thea Energy is a credible early-career option for students in relevant STEM fields because Thea Energy runs paid spring and summer internships with clearly described technical tracks. Thea Energy is also unusually clear on pay ranges for many roles, including hourly internship pay. The biggest constraints are limited public detail on interview stages and feedback, plus very little published evidence on early-career progression and retention outcomes.
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