• Prepare, validate, and submit client invoices accurately and on time according to contract terms and client-specific requirements. • Reconcile timekeeping, expense, and payroll data to confirm accuracy prior to billing. • Track and manage purchase orders (POs), cost codes, and work orders to ensure proper funding and approval alignment. • Submit and monitor invoices through client and third-party systems (OpenInvoice, Ariba, Cortex, Fieldglass, or other VMS tools). • Audit and maintain complete supporting documentation including jobsheets, client approvals, and project references. • Collaborate with Payments, Payroll, and Accounting teams to resolve discrepancies and ensure data integrity prior to revenue recognition and invoice submission. • Track submission progress and contribute to month-end reporting. • Manage accounts receivable aging for assigned portfolios to ensure prompt payment and minimal delinquency. • Conduct consistent outreach to client contacts and intermediaries to confirm invoice receipt, resolve disputes, and secure payment commitments. • Log all communications, payment activity, and resolution updates within collections software for visibility and continuity. • Partner with Sales, Account Management, and Operations to address recurring issues, coordinate on approvals, and enhance customer experience. • Work with Managed Service Providers (MSPs) and vendor management intermediaries to ensure compliance with payment and approval processes. • Support reconciliation of unapplied cash and assist Accounting during monthly close to ensure accuracy in financial reporting. • Monitor client trends, flag potential risks, and communicate delays or anomalies to leadership for resolution. • Collaborate with Sales, Account Management, and Customer Support teams to align on client status, open issues, and strategic account priorities. • Partner with broader Financial Operations functions (Payroll, Payments, Invoicing, Cash, Credit, and Collections) to resolve complex account reconciliations or delinquent balances. • Participate in audits and process reviews, ensuring documentation and reporting meet internal and client standards. • Coordinate with Data, Systems, and Engineering teams to enhance process automation, reporting accuracy, and system integration. • Identify and communicate recurring process challenges; propose improvements and support implementation of new workflows or documentation updates. • Contribute to team meetings, training sessions, and cross-functional initiatives that strengthen collaboration and operational consistency.