Accounts Payable Specialist

Posted Yesterday
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Devens, MA, USA
Hybrid
Entry level
Energy
The Role
Process 200–300 invoices weekly, perform two- and three-way matching, investigate discrepancies, communicate with vendors and internal teams, support payments and month-end close, reconcile statements, prepare accrual support, and identify process improvements while maintaining approvals and documentation controls.
Summary Generated by Built In
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 an Accounts Payable Specialist
 
As an Accounts Payable Specialist, you will be responsible for providing accurate, timely accounts payable processing while helping improve how invoices move from receipt to payment. Reporting to the Accounts Payable Supervisor, the AP Specialist will manage a high-volume invoice queue, investigate discrepancies, coordinate resolution with vendors and internal partners, and support month-end close. The role calls for curiosity about why problems occur and practical ideas that reduce repeat issues, delays, and rework. The AP Supervisor remains accountable for team priorities, oversight, and escalation decisions. The AP Specialist owns assigned invoice processing, documentation, and follow-through; coordinates with the responsible buyer, requester, or approver; and escalates unresolved issues with facts and a proposed next step. Payment approvals, purchasing decisions, and accounting policy remain with authorized owners.

What you'll do:

  • Invoice processing: Manage roughly 200–300 invoices per week; verify vendor, invoice number, date, amount, entity, PO, and coding using approved guidance; investigate duplicate alerts before processing

  • Matching and controls: Perform two-way and three-way matching; verify receipts, service approvals, payment terms, tax, freight, and exemption support; resolve or escalate discrepancies before payment

  • Exception resolution: Work with Procurement, Receiving, requesters, and vendors to resolve missing receipts, insufficient PO funds, billing errors, and approval delays; track hold reasons, owners, and next action dates

  • Vendor and payment support: Respond professionally to payment inquiries; obtain corrected invoices and credit memos; track credits and refunds; prepare payment support under established approvals and safeguards, including duplicate-payment checks for automatic debits

  • Month-end support: Identify unbilled vendor and contractor costs; provide accrual support and reconcile vendor statements and AP records; coordinate coding questions and close items with Accounting

  • Process improvement: Identify recurring exceptions and their causes; recommend practical fixes; update procedures and support approved workflow improvements, system testing, and cross-training

  • Own the follow-through: Organize the queue by due date and risk, follow up promptly, and close the loop with vendors and internal partners

  • Ask and investigate: Question unclear or inconsistent information, use supporting records to understand the issue, and bring recommendations to the supervisor

  • Collaborate and protect controls: Work constructively across functions, communicate blockers early, handle sensitive information carefully, and preserve required approvals and documentation

What we're looking for:

  • Relevant high-volume accounts payable experience, including two-way and three-way matching, vendor communication, and month-end support
  • ERP experience required
  • Working knowledge of debits and credits, accruals, expense coding, purchase orders, GL accounts, and reconciliations
  • Strong Excel, strong attention to detail, atrong organization, and clear communication
  • Ability to investigate discrepancies, recognize patterns, follow through, and adapt as processes change

Must-have requirements:

  • Perform activities such as typing, standing, or sitting for extended periods of time
  • 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.

Skills Required

  • Relevant high-volume accounts payable experience, including two-way and three-way matching, vendor communication, and month-end support
  • ERP experience
  • Working knowledge of debits and credits, accruals, expense coding, purchase orders, GL accounts, and reconciliations
  • Strong Microsoft Excel skills
  • Strong attention to detail and organization
  • Clear communication skills
  • Ability to investigate discrepancies, recognize patterns, follow through, and adapt as processes change
  • Ability to type, stand, or sit for extended periods
  • 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

Commonwealth Fusion Systems Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Commonwealth Fusion Systems and has not been reviewed or approved by Commonwealth Fusion Systems.

  • Healthcare Strength — Health insurance is a core part of the package, with broad medical coverage presented as competitive for a growing tech and engineering employer. This is consistently listed alongside other cornerstone benefits.
  • Retirement Support — A 401(k) program with employer match is prominently included in compensation descriptions, signaling support for long-term savings. This appears across roles, including technical and production postings.
  • Parental & Family Support — Generous parental leave is cited as a notable element of the offering. It sits alongside paid leave options that many candidates prioritize.

Commonwealth Fusion Systems Insights

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The Company
HQ: Cambridge, MA
327 Employees
Year Founded: 2018

What We Do

Commonwealth Fusion Systems (CFS) has the fastest, lowest cost path to commercial fusion energy. CFS is collaborating with MIT to leverage decades of research combined with new groundbreaking high-temperature superconducting (HTS) magnet technology. HTS magnets will enable compact fusion power plants that can be constructed faster and at lower cost. CFS is now building SPARC, the world's first commercially relevant, net energy fusion demonstration device. SPARC will pave the way for the first fusion power plant, ARC, that will produce power on the grid. The ultimate mission is to deploy fusion power plants to meet global decarbonization goals as fast as possible. CFS has assembled a team of leaders in tough tech, fusion science, and manufacturing with a track record of rapid execution. Supported by the world’s leading investors, CFS is uniquely positioned to deliver limitless, clean, fusion power to combat climate change. If you are interested in joining our team, check out cfs.energy/careers for more information.

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