Senior Manager, Accounting Operations

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 and suppliers to build the energy industry of the future.

We’re in the best position to make it happen. Since 2018, we’ve raised nearly $3 billion in capital, making us the largest and leading private 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.

The Senior Manager, Accounting Operations will own Accounting Operations across accounts payable, payroll, expense reporting, and state filing compliance. This role will serve as the manager-level owner for issue triage, escalation handling, process discipline, staff development, and cross-functional coordination across expense reporting, procure-to-pay, and payroll workflows. The role is structural in nature: it creates one clear owner for work that is currently fragmented across staff, consultants, and senior accounting leadership, reducing operational bottlenecks and helping the Accounting organization scale as CFS grows.

• Lead the Accounting Operations function for a rapidly growing organization, including AP, payroll, expense reporting, and state filing compliance
• Serve as the first-line manager-level owner for operational accounting issue triage, escalation handling, root-cause follow-up, and process discipline
• Manage and develop the AP, payroll, expense reporting, and state filing compliance team; build role clarity, cross-training, backup coverage, and accountability
• Oversee accounts payable operations, including invoice processing, vendor bill flow, payment preparation, vendor-related issue resolution, and adherence to procure-to-pay processes
• Partner with Supply Chain, FP&A, and Buyers on PO creation, PO management, receiving discipline, buyer/category accuracy, invoice flow, and process improvement
• Oversee payroll operations in partnership with People Ops, including timelines, controls, handoffs, issue resolution, and backup coverage
• Own expense reporting and corporate card process compliance, including policy adherence, approval discipline, supporting documentation, and issue resolution
• Own state filing compliance execution, including filing calendars, registrations, external provider coordination, documentation, and timely completion of required deliverables
• Partner with ERP/IT and business process owners to identify workflow gaps, improve Odoo-enabled processes, support automation, and strengthen transaction traceability
• Document key operating procedures, create scalable SOPs and training materials, and ensure process changes are communicated and adopted across impacted functions
• Monitor operational accounting metrics and recurring issues to identify trends, reduce rework, and improve processing accuracy and cycle time
• Support monthly close activities related to AP, payroll, expenses, accruals, payments, and compliance areas, ensuring activities are completed timely and accurately
• Support internal controls, audit readiness, and compliance activities related to AP, payroll, expense reporting, and state filings

• Bachelor’s degree in Business Administration or Accounting or similar field preferred
• Minimum of 7 years of relevant accounting, accounting operations, or finance operations experience
• Minimum of 5 years of supervisory, team lead, or process-owner experience in a finance/accounting environment
• Hands-on experience with AP, payroll coordination, expense reporting, state filing compliance, or related operational accounting workflows
• Demonstrated experience improving processes, resolving operational bottlenecks, documenting procedures, and driving accountability across functions
• Experience working cross-functionally with teams such as Supply Chain, FP&A, People Ops/HR, ERP/IT, operations, or procurement
• Strong process ownership, issue…