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Helion Energy

Principal Experimental Scientist

Become a Principal Experimental Scientist at Helion Energy in Everett, USA. Lead the design and deployment of plasma diagnostics for fusion generators. Enjoy a competitive salary, equity grants, and 31 days of PTO.
Helion Energy
Helion Energy
Everett, United States   On-site   Full Time   USD 180k–250k yearly  UTC-07:00

Helion Energy

Company Overview

Helion Energy

Everett, WA, United States

2013

Business Model

Energy

Development of fusion energy technology

Funding from investors, government grants, and partnerships

Locations & Geography

United States

Company Culture

Their mission is to develop clean, limitless energy through fusion technology.

They promote a collaborative and innovative work environment.

They offer opportunities for professional growth and skill development.

Activities & Projects

They are currently working on the Polaris project, which aims to demonstrate net energy gain from fusion.

Helion Energy is innovating in the field of plasma physics and magnetic confinement.

They focus on sustainable energy solutions that minimize environmental impact.

Career Opportunities

Typical job openings include roles in engineering, research, and operations.

They offer competitive salaries, health benefits, and a flexible work schedule.

Contact Information

LinkedIn

Careers at Helion Energy


Last updated on 2025-04-22 | Report an issue

We are a fusion power company based in Everett, WA, with the mission to build the world's first fusion power plant, enabling a future with unlimited clean electricity. Our vision is a world with clean, reliable, and affordable energy for everyone.

Since Helion's founding in 2013, we have raised over $1 billion from long-time investors such as Sam Altman, Mithril, and Capricorn Investment Group as well as new investors SoftBank and Lightspeed to propel us forward. Our last prototype, Trenta, completed 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). We are now operating Polaris, our next prototype on the path to the world's first fusion power plant.

This is a pivotal time to join Helion. You will tackle real-world challenges with a team that prizes urgency, rigor, ownership, and a commitment to delivering hard truths – values essential to achieving what no one has before. Together, we will change the future of energy, because the world can't wait.

What You Will Be Doing

We are looking for an Experimental Plasma Scientist to lead the plasma diagnostic effort of Helion's fusion generators. This is an onsite role that reports directly to our Director of Experimental Science at our Everett, WA office.

You Will

  • Own the end-to-end design and deployment of a comprehensive suite of plasma diagnostics, collaborating closely with physicists, engineers, designers, and data analysts to ensure robust, scalable instrumentation that meets both experimental and operational requirements
  • Integrate cross-disciplinary technical input from experts across Helion—including plasma physics, machine operations, controls, and data science—to align diagnostic capabilities with real-time operational needs and long-term scientific milestones
  • Lead the hands-on execution of assembly, installation, calibration, and commissioning processes for diagnostics across multiple campaigns and testbeds. Ensure high data fidelity through rigorous validation and alignment procedures
  • Develop foundational expertise in pre-ionization plasma diagnostics, establishing best practices and internal methodologies that inform next-generation fusion device development optimized for energy gain and power conversion
  • Analyze diagnostic data in real time to extract actionable insights about plasma behavior, inform operational tuning, and identify opportunities for performance optimization and system redesign
  • Partners with leadership across the organization, contributing to strategic planning, roadmap development, and long-term technical vision

Required Skills

  • Ph.D. in physics, electrical engineering, aerospace engineering, or a related discipline, with a focus on plasma science, diagnostics, or high-vacuum instrumentation
  • 10+ years of experience working in advanced laboratory environments, with extensive hands-on work involving plasma generation, plasma systems, and UHV vacuum infrastructure
  • Demonstrated track record using diagnostic measurements (e.g., interferometry, spectroscopy, Langmuir probes, magnetic coils, electrostatic diagnostics) to evaluate plasma parameters such as density, temperature, and current profiles, directly influencing system improvements
  • Deep expertise and unique domain knowledge in multiple areas of plasma diagnostics and fusion engineering. Recognized as a subject matter expert who operates independently

Helion's compensation package includes a competitively benchmarked base salary, meaningful equity grants, and comprehensive benefits. Final compensation is determined through a holistic evaluation of your experience, qualifications, and our commitment to internal equity - ensuring fairness and transparency across our teams. We are committed to fostering a fair and equitable environment in every aspect of our operations, including compensation.

This is an exempt salaried role.

Annual Base Pay

$180,000 - $250,000 USD

Benefits

Our total compensation package includes benefits, including but not limited to:

  • Medical, Dental, and Vision plans for employees and their families
  • 31 Days of PTO (21 vacation days and 10 sick days)
  • 10 Paid holidays, plus company-wide winter break
  • Up to 5% employer 401(k) match
  • Short term disability, long term disability, and life insurance
  • Paid parental leave and support (up to 16 weeks)
  • Annual wellness stipend

Helion is an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. If you need assistance or an accommodation during the interview process, please let us know.

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About the role

September 7, 2025

Full Time

Company

September 7, 2025

On-site

USD 180k–250k yearly

Helion Energy

helionenergy.com

  •  Everett, United States

10+ years

UTC-07:00

Apply now

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