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Assistant General Counsel – Commercial

Commonwealth Fusion Systems

Job Location:

Devens, MA - USA

Yearly Salary: USD 250000 - 300000

Posted: 29 September 2026 (2 days ago)

Application Deadline: 27 December 2026

Vacancies: 1 Vacancy

Job Summary

About Commonwealth Fusion Systems:

Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.

Combining decades of research top talent and new technologies were designing and building commercially viable fusion power plants. And were working with policymakers suppliers and many others to build the energy industry of the future.

Were in the best position to make it happen. Since 2018 weve raised $4 billion of capital making us the largest and leading fusion company in the world.

Now were looking for more thinkers doers builders and makers to join us. People wholl bring new perspectives solve tough problems and thrive as part of a team.

If thats you and this role fits we want to hear from you.

Join the power movement as Assistant General Counsel Commercial

CFS is seeking an experienced pragmatic and highly strategic Assistant General Counsel Commercialto serve as a foundational leader on our legal team. This is a rare opportunity to shape how legal operates at a company building an entirely new industry from the ground up.

This role is a true n of 1: you will be the companys dedicated commercial legal lead operating as both a hands-on individual contributor on CFSs most complex mission-critical transactions and the architect of the legal infrastructure that will support the companys next phase of commercial growth. As CFS scales you will be expected to build and lead a team in commercial and corporate legal making this as much a leadership opportunity as a technical legal one.

Reporting directly to the Chief Legal Officer you will partner with executive leaders across commercial and business development corporate development strategic partnerships supply chain finance and engineering giving you direct visibility into and influence over the companys most consequential strategic decisions

Why This Role Matters:

CFS is at an inflection point moving from R&D to commercial execution. The deals structures and legal foundation this person builds now will directly shape how CFS contracts partners and scales for years to come. This is not a maintenance role it is a builder role for someone who wants outsized ownership over both the substance of high-stakes deals and the systems that make the whole commercial legal function work.

What Youll Do

Build & Scale the Commercial Legal Function Serve as the architect of CFSs commercial legal capability building on and improving existing processes to create scalable contract workflows tools standard templates negotiation playbooks and training that empower business teams and accelerate deal velocity. Lay the groundwork for and ultimately recruit and lead a team as the function grows

Lead High-Stakes Commercial and Partnership Negotiations Structure draft and negotiate complex high-value commercial and partnership agreements including key customer supplier and vendor deals long-term procurement contracts joint developments strategic alliances and partnerships

Drive Corporate Development & Strategic Partnerships Serve as a core legal partner on corporate development initiatives strategic partnerships joint ventures strategic investments technology transfers licensing and other complex transactions central to scaling commercial fusion. Partner closely with corporate development and open innovation teams to structure and close deals that advance CFSs strategic position

Support Core Corporate Legal Matters Provide legal support on corporate subsidiary and entity management and corporate transactions as they relate to commercial corporate development or strategic partnership transactions and agreements serving as a trusted resource to the CLO CFO and CCO on corporate-adjacent legal needs beyond commercial deal work

Advise Supply Chain & Operations Serve as the primary legal advisor to procurement and global supply chain teams mitigating risk across complex multi-tiered international supply chains for advanced hardware specialized materials and manufacturing

Drive Pragmatic Risk Management Provide business-minded creative and actionable legal guidance that balances risk mitigation with the urgency and agility required to hit CFSs commercial milestones

Cross-Functional Leadership & Collaboration Partner closely with commercial corporate development supply chain engineering global affairs finance and compliance teams to ensure alignment and seamless execution across all commercial and corporate development activity and act as a visible legal leader within the broader organization

What Youll Bring

Education & Bar: J.D. from an accredited law school and active bar admission in good standing in at least one U.S. jurisdiction (eligible for MA In-House Counsel registration)

Experience: 12 years of legal experience ideally starting at a top-tier law firm followed by significant in-house experience at a fast-growing complex technology energy advanced manufacturing or industrial company

Commercial Expertise: Deep background in drafting and negotiating complex commercial contracts strategic partnerships global supply chain agreements and corporate development transactions (JVs strategic investments licensing tech transfer)

Corporate Legal Exposure: Familiarity with core corporate legal matters governance entity structuring and general corporate transaction support sufficient to advise confidently alongside commercial work

0-to-1 Process Builder: Proven track record of creating operationalizing and/or improving commercial legal systems contract management tools (CLM) and negotiation playbooks from the ground up

Leadership Trajectory: Experience mentoring managing or building legal teams or a clear readiness to do so this role is expected to grow into a team lead position

Business Acumen & Pragmatism: Exceptional judgment and the ability to synthesize complex technical operational and legal concepts into clear actionable advice for non-lawyers

Executive Presence: Comfort advising senior leadership and acting as a trusted strategic partner to the CLO and business unit executives

Adaptability & Drive: A proactive self-starter mentality comfortable operating in a fast-changing high-ambiguity environment where innovation happens daily

Mission Alignment: A genuine passion for clean energy deep technology science-based product commercialization and CFSs mission to bring fusion to the grid

Must-have requirements:

Dedication to safety to mitigate hazards that may include heat cold noise fumes strong magnets lead high voltage and cryogenics
Willingness to occasionally travel or work required nights/weekends/on-call

$250000 - $300000 a year

Salary range for this full-time position equity benefits.The actual salary will depend on level location qualifications and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations. Benefits include:

Competitive compensation with equity

13 Company-wide Holidays

Flexible vacation days

10 sick days

Generous parental leave policy

Health dental and vision insurance

401(k) with employer matching

Professional growth opportunities

Team-building activities

Why Join CFS

At CFS you wont just be managing contracts you will be laying the legal and commercial operational foundation for an entirely new global industry with the opportunity to build and eventually lead the team that carries it forward. We offer competitive compensation comprehensive health and wellness benefits a collaborative environment and the opportunity to work alongside world-class experts dedicated to solving one of humanitys greatest challenges.

At CFS we excel in fast-paced environments driven by our values of integrity execution impact and self-critique. As we grow were eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.

We value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally regardless of race color national origin ancestry citizenship status protected veteran status religion physical or mental disability marital status sex sexual orientation gender identity or expression age or any other basis protected by law.

This role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively Export Control Laws). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.

Required Experience:

Junior IC

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