Manage supplier onboarding, vendor records, customer procurement portals, invoice submissions, payment inquiries, and compliance documentation. Track approvals, disputes, corrections, credit memos, and rebills while resolving portal and invoice issues. Coordinate with customers, suppliers, Sales, Legal, Compliance, Finance, and Accounts Receivable on account updates, entity transitions, tax changes, banking details, and billing requirements. Maintain accurate records and administer supplier registrations, account access, and portal connections.