Handle petty cash and Accounts Payable operations, including reviewing and processing reimbursement requests, preparing electronic or paper backup documentation, performing General Ledgers coding, and maintaining departmental petty cash records; also responsible for maintaining the Accounts Payable address book and acting as backup to Accounts Payable team members and managers as needed. Prepare and verify all Accounts Payable payments, including purchase order-related invoices, non-Purchase Order invoices, and travel/expense reimbursements by validating supporting documents, reconciling Purchase Orders with receiving reports and invoices, resolving discrepancies, ensuring proper approval per the Commitment Authority Policy, and confirming accurate general ledger coding.