Oversee and review the accurate, timely, and compliant processing of invoices, vouchers, expense reports, payment requests, and other accounts payable transactions, ensuring appropriate authorization, complete documentation, adherence to company policies and internal controls, and timely processing in accordance with established deadlines and service-level expectations. Clean Harbors is seeking an Accounts Payable Supervisor to be responsible for preparing and executing the weekly pay runs, review and provide related accounting reports ensuring timely accounts payable month end close and accurate postings.