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Climate/Energy

Commonwealth Fusion Systems

Commercial fusion energy solutions

Devens· 92 rolesMilpitas· 8 rolesSomerville· 4 roles

CORE INFO

$863M
Total Funding
Series B
Round
2018
Founded
350
Team Size
Devens, Massachusetts, USA
Headquarters

Commonwealth Fusion Systems (CFS) is pioneering the development of compact, high-field tokamak fusion systems aimed at providing clean, sustainable energy solutions. Their technology is designed for energy providers seeking to transition to renewable sources and combat climate change.

  • Series B2 funding round raised $863 million with participation from Nvidia, Google, and Breakthrough Energy Ventures.techcrunch.com
  • Google signed a power purchase agreement to receive 200 megawatts from CFS's ARC project in Virginia.en.wikipedia.org
  • TechCrunch reported on CFS's significant investment from major tech companies, highlighting the growing interest in fusion energy.techcrunch.com

WHY WE WOULD WORK AT COMMONWEALTH FUSION SYSTEMS

Pioneering Fusion Technology

Join a team at the forefront of developing compact, high-field tokamak systems like SPARC, aimed at achieving net energy gain from fusion.

Combat Climate Change

Contribute to a mission dedicated to providing sustainable energy solutions that combat climate change through commercial fusion energy.

Collaborative Culture

Be part of a diverse team of 350 employees who value execution, integrity, and open dialogue, fostering a dynamic work environment.

Strong Financial Backing

Benefit from nearly $3 billion in funding, including a recent $863 million Series B2 round led by major investors like Nvidia and Google.

Impactful Projects

Work on groundbreaking projects like ARC, the planned 400-megawatt fusion power plant that aims to deliver clean electricity to the grid.

Innovative Technology

Utilize cutting-edge high-temperature superconducting magnets, essential for creating efficient fusion reactors and advancing energy technology.

MARKET AND TRACTION

TOTAL ADDRESSABLE MARKET

  • The global fusion energy market is poised for significant growth as the world seeks sustainable and clean energy solutions to combat climate change.

  • CFS aims to tap into this market by developing commercially viable fusion power plants, with the potential to provide a substantial portion of the world's energy needs in the future.
  • KEY METRICS

    ✦ KEY METRIC
  • CFS has raised nearly $3 billion in total funding across multiple rounds, with the most recent Series B2 round securing $863 million.

  • The company has approximately 350 employees, reflecting its growth and commitment to advancing fusion technology.
  • NOTABLE CUSTOMERS

  • In July 2025, Google signed a corporate power purchase agreement with CFS to receive 200 megawatts of power from the planned ARC project in Virginia.

  • This agreement highlights CFS's ability to attract major corporate clients interested in sustainable energy solutions.
  • GROWTH TACTICS

  • CFS focuses on developing high-temperature superconducting (HTS) magnets, which are crucial for their compact tokamak designs, enabling efficient fusion reactions.

  • The company is actively pursuing partnerships and agreements, such as the collaboration with Eni to construct the SPARC experimental plant and the first ARC power plant.
  • MARKET POSITION

  • CFS is positioned as a leader in the fusion energy sector, with ambitious plans to build the world's first grid-scale commercial nuclear fusion power plant.

  • Their innovative approach and significant funding from notable investors like Nvidia and Google underscore their competitive advantage in the clean energy market.
  • PRODUCT AND TECH

    SPARC Tokamak

    SPARC is a compact tokamak designed to demonstrate net energy gain from fusion reactions, serving as a critical step towards achieving practical fusion energy.

    ARC Power Plant

    The ARC is a planned 400-megawatt commercial fusion power plant that aims to deliver clean electricity to the grid, representing a significant advancement in sustainable energy solutions.

    High-Temperature Superconductors

    CFS specializes in high-temperature superconducting (HTS) magnets, which are essential for creating the strong magnetic fields needed to sustain fusion reactions in their compact tokamak designs.

    Fusion Energy Commercialization

    CFS is dedicated to the commercialization of fusion energy, focusing on building and scaling fusion power plants that provide cost-competitive, clean energy to combat climate change.

    Collaborative Partnerships

    CFS has established strategic partnerships, including a notable agreement with Google for a power purchase from the ARC project, enhancing its position in the energy market.

    COMPANY CULTURE

    Values

  • Execution: Focus on delivering results quickly and efficiently.

  • Self-Critique: Emphasize data-driven decision-making and open dialogue.

  • Integrity: Commitment to scientific integrity and ethical treatment of individuals.

  • Impact: Driven to create economically viable solutions to combat climate change.
  • Operating Principles

  • Innovation: Foster a culture of creativity and technological advancement.

  • Collaboration: Encourage teamwork across disciplines to achieve common goals.

  • Transparency: Maintain open communication about progress and challenges.

  • Sustainability: Prioritize environmentally friendly practices in all operations.
  • Benefits

  • Competitive salary and equity options to attract top talent.

  • Opportunities for professional development and continuous learning.

  • Flexible work arrangements to support work-life balance.

  • Health and wellness programs to promote employee well-being.
  • Learning & Growth

  • Regular training sessions on cutting-edge fusion technology.

  • Mentorship programs pairing new employees with experienced staff.

  • Access to conferences and workshops in the energy sector.

  • Encouragement of innovative thinking and experimentation in projects.
  • Team Cadence

  • Weekly team meetings to align on project goals and progress.

  • Monthly all-hands meetings to share company updates and celebrate achievements.

  • Regular feedback sessions to foster continuous improvement.

  • Collaborative project sprints to drive innovation and efficiency.
  • COMPENSATION SNAPSHOT

    C
    Comp score vs cohort
    vs. Climate/Energy · Series B · US
    Based on publicly available compensation ranges from job postings; exact compensation may vary.
    Engineering IC3n = 16
    $90K – $145Kmedian $118K
    Boston
    Engineering IC4n = 22
    $110K – $185Kmedian $148K
    Boston
    Engineering IC5n = 11
    $130K – $204Kmedian $167K
    AggregateBoston
    Engineering Managern = 5
    $110K – $185Kmedian $148K
    Boston
    G&An = 9
    $150K – $225Kmedian $188K
    Boston
    Operationsn = 28
    $67K – $104Kmedian $86K
    Boston
    US-only in v1 · only categories with n > 2 shown · in-person / hybrid / remote treated separately where n ≥ 3

    HIRING SIGNAL

    104
    Open roles on their careers page
    Snapshot via live ATS poll
    —
    Net new roles in the last 90 days
    Available once weekly history accrues
    90-Day VelocityV2 · BACKFILL
    Trend builds weekly as historical rows accrue
    By Function
    Breakdown of open roles
    Other · 80
    Design · 4
    G&A · 2
    Operations · 9
    Engineering · 9
    Top Locations
    Where hiring is concentrated
    Remote-eligible postings counted separately
    Devens, MA
    90
    Milpitas, CA
    8
    Somerville, MA
    4
    Devens, MA & Richmond, VA
    1
    Devens, MA & Somerville, MA
    1
    SourcesGreenhouseLeverAshbyWorkableSmartRecruitersRipplingRecruiteeFallback · Wellfound, YC Work-at-a-Startup, careers-page scrape

    KEY COMPANY ANNOUNCEMENTS

    Filter
    9 announcements · ranked by importance
    Dec 1, 2021FUNDINGCommonwealth Fusion Systems Raises $1.8B from Gates, Soroswsj.com
    Dec 23, 2024MILESTONECommonwealth Fusion Systems to Build First Commercial Fusion Power Plantcfs.energy
    Jul 30, 2026FUNDINGCommonwealth Fusion Systems Raises Another $1 Billion as Work on Commercial Power Plant Continuespowermag.com
    Aug 28, 2025FUNDINGNvidia, Google, and Bill Gates help Commonwealth Fusion Systems raise $863M | TechCrunchtechcrunch.com
    Sep 22, 2025CUSTOMER WINAn oil and gas giant signed a $1B deal with Commonwealth Fusion Systemstechnologyreview.com
    Nov 14, 2025CUSTOMER WINGoogle Just Bought Power From a Fusion Plant That Doesn't Exist Yetyoutube.com
    Sep 10, 2021MILESTONECommonwealth Fusion Systems creates viable path to commercial fusion powercfs.energy
    Dec 11, 2025INTERVIEWFusion isn't here - but leading startup is making construction progressaxios.com
    “CEO Bob Mumgaard discusses CFS's progress”axios.com · Dec 11, 2025
    Aug 1, 2023MILESTONEThe SPARC Toroidal Field Model Coil Programarxiv.org