Accounts Payable Specialist

Commonwealth Fusion Systems•Devens, MA

19d•$40 - $60

About The Position

Commonwealth Fusion Systems is seeking an Accounts Payable Specialist to provide accurate, timely accounts payable processing and help improve the movement of invoices from receipt to payment. Reporting to the Accounts Payable Supervisor, the specialist manages a high-volume invoice queue, investigates discrepancies, coordinates resolutions with vendors and internal partners, and supports month-end close. The role requires curiosity about the causes of problems and practical ideas to reduce recurring issues, delays, and rework. The AP Supervisor is accountable for team priorities, oversight, and escalation decisions. The specialist owns assigned invoice processing, documentation, and follow-through; coordinates with responsible buyers, requesters, or approvers; and escalates unresolved issues with supporting facts and a proposed next step. Payment approvals, purchasing decisions, and accounting policy remain with authorized owners. The position is full-time and requires working in a facility that contains industrial hazards. Compensation is $40–$60 per hour, plus equity and benefits; actual compensation depends on level, location, qualifications, and experience. Employment offers are contingent on compliance with applicable U.S. export control laws.

Requirements

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 Excel skills, strong attention to detail, strong organization, and clear communication.
Ability to investigate discrepancies, recognize patterns, follow through, and adapt as processes change.
Ability to perform activities such as typing, standing, or sitting for extended periods.
Ability to work in a facility containing industrial hazards, including heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics.

Responsibilities

Process roughly 200–300 invoices per week, verifying vendor, invoice number, date, amount, entity, purchase order, and coding using approved guidance; investigate duplicate alerts before processing.
Perform two-way and three-way matching and verify receipts, service approvals, payment terms, tax, freight, and exemption support; resolve or escalate discrepancies before payment.
Coordinate with Procurement, Receiving, requesters, and vendors to resolve missing receipts, insufficient purchase order funds, billing errors, and approval delays; track hold reasons, owners, and next action dates.
Respond to payment inquiries, obtain corrected invoices and credit memos, track credits and refunds, and prepare payment support under established approvals and safeguards, including duplicate-payment checks for automatic debits.
Support month-end close by identifying unbilled vendor and contractor costs, providing accrual support, reconciling vendor statements and AP records, and coordinating coding questions and close items with Accounting.
Identify recurring exceptions and their causes, recommend practical fixes, update procedures, and support approved workflow improvements, system testing, and cross-training.
Organize the invoice queue by due date and risk, follow up promptly, and close the loop with vendors and internal partners.
Investigate unclear or inconsistent information using supporting records and bring recommendations to the supervisor.
Collaborate across functions, communicate blockers early, handle sensitive information carefully, and preserve required approvals and documentation.