Commonwealth Fusion Systems

Develops high-temperature superconducting fusion magnets

Technical Accounting and Internal Controls Lead

Internal Audit & ControlsConfirmed live in the last 24 hours

Full-timeDevens, MA, USA$142k - $177k /yr

About the Job

Requirements

A bachelor's degree in Accounting, Finance, or a related field is required.
An active Certified Public Accountant (CPA) license is required.
At least 10 years of experience in accounting, audit, internal controls, or advisory, with meaningful hands-on responsibility for both technical accounting and control design or SOX readiness.
Experience building or materially advancing a controls program in a high-growth, pre-IPO, newly public, or complex public-company environment.
Strong command of U.S. generally accepted accounting principles (GAAP), the Committee of Sponsoring Organizations (COSO) framework, financial statement assertions, and internal control over financial reporting (ICFR) design and evaluation.
Ability to write clear, defensible accounting memoranda; apply pragmatic, risk-based judgment; influence without direct authority; communicate clearly; and drive work end to end while balancing rigor with business needs.
Ability to perform extended activities such as typing, standing, sitting, and walking.
Occasional nights, weekends, or on-call work may be required during payroll processing, month-end close, audit, compliance deadlines, system issues, or urgent operational escalations.
Ability to work in a facility with industrial hazards including heat, cold, noise, fumes, strong magnets, lead, high voltage, high current, pressure systems, and cryogenics.

Responsibilities

Own the controls program by maintaining the risk-based roadmap, governance, annual plan, issue log, remediation cadence, and concise management reporting.
Define scope and accountability by mapping significant accounts, processes, systems, assertions, risks, controls, and owners, and refreshing scope as the business evolves.
Develop and maintain durable documentation, including narratives, flowcharts, risk-and-control matrices, entity-level controls, management review controls, and policies.
Drive remediation and readiness by identifying design and execution gaps, assigning owners and dates, verifying closure, and preparing priority processes for operating-effectiveness testing and future Sarbanes-Oxley (SOX) requirements.
Lead technical accounting by researching and documenting U.S. GAAP conclusions for complex or unusual transactions and translating them into policies, journal-entry treatment, disclosures, processes, and controls.
Embed controls into operations and systems by partnering across Accounting, Financial Planning and Analysis (FP&A), Legal, Information Technology (IT), People, Supply Chain, and program teams, including during enterprise resource planning (ERP) and other finance-system implementations.
Coordinate assurance by serving as a primary liaison to external auditors and specialized advisors while retaining internal ownership of decisions, evidence standards, and execution.

Desired Qualifications

Experience in a high-growth, manufacturing, research and development (R&D), project-based, or operationally complex environment.
Experience with Odoo or similar enterprise resource planning (ERP) systems.

Salary Range: 142000 to 177000 (Currency: USD) (Pay period: per-year-salary)

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, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.

We’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.

Now we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.

If that’s you and this role fits, we want to hear from you.

Join the power movement as Technical Accounting and Internal Controls Lead

Build and operate CFS's management-owned internal controls capability while serving as Accounting's technical lead. This is a senior individual-contributor and hands-on builder role, not another assessment: the role will turn the existing roadmap into documented, operating, and sustainable controls; resolve complex accounting matters; and create the discipline required for efficient audits, scalable growth, and long-term public-company readiness.

What you'll do:

Own the controls program. Maintain the risk-based roadmap, governance, annual plan, issue log, remediation cadence, and concise management reporting
Define scope and accountability. Map significant accounts, processes, systems, assertions, risks, controls, and owners; refresh scope as the business evolves
Build durable documentation. Develop and maintain narratives, flowcharts, risk-and-control matrices, entity-level controls, management review controls, and policies
Drive remediation and readiness. Identify design and execution gaps, assign owners and dates, verify closure, and prepare priority processes for operating-effectiveness testing and future SOX requirements
Lead technical accounting. Research and document U.S. GAAP conclusions for complex or unusual transactions and translate them into policies, journal-entry treatment, disclosures, processes, and controls
Embed controls into operations and systems. Partner across Accounting, FP&A, Legal, IT, People, Supply Chain, and program teams, including during ERP and other finance-system implementations
Coordinate assurance. Serve as a primary liaison to external auditors and specialized advisors while retaining internal ownership of decisions, evidence standards, and execution

What we’re looking for:

Bachelor’s degree in Accounting, Finance, or a related field.
Active CPA required
10+ years in accounting, audit, internal controls, or advisory, with meaningful hands-on responsibility for both technical accounting and control design or SOX readiness. Experience building or materially advancing a controls program in a high-growth, pre-IPO, newly public, or complex public-company environment
Strong command of U.S. GAAP, COSO, financial statement assertions, and ICFR design and evaluation
Ability to write clear, defensible accounting memoranda; apply pragmatic, risk-based judgment; influence without direct authority; communicate clearly; and drive work end to end while balancing rigor with business needs

Bonus points for:

Experience in a high-growth, manufacturing, R&D, project-based, or operationally complex environment
Experience with Odoo or similar ERP systems

Must-have Requirements:

Perform extended activities such as typing, standing, sitting, walking, etc.
Occasional nights/weekends/on-call may be required during payroll processing, month-end close, audit, compliance deadlines, system issues, or urgent operational escalations.
Work in a facility that contains industrial hazards including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics

#LI-Hybrid

At CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re 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.

About the Company

Commonwealth Fusion Systems

Develops high-temperature superconducting fusion magnets

Commonwealth Fusion Systems builds fusion energy systems that aim to provide clean, affordable power. It designs tokamaks using high-temperature superconducting magnets to make smaller, less expensive machines. Its flagship SPARC is intended to produce net energy, with ARC envisioned as the first commercial fusion power plant. The company collaborates with MIT and focuses on a data-driven, mission-focused path to scalable fusion energy for large energy users.

Company size: 1,001-5,000
Company stage: Grant
Total funding: $4B
Headquarters: Harvard, MA
Founded: 2018

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