Lead end-to-end functional support and service delivery for SAP Ariba solutions, including Strategic Sourcing, Contracts, Buying and Invoicing, Guided Buying, Supplier Lifecycle and Performance, Supplier Risk, Catalogs, and SAP Business Network. Ensure robust integration between SAP Ariba and SAP S/4HANA or ECC for master data, sourcing, contracts, purchase requisitions, purchase orders, goods receipts, service entry, invoices, accounting documents, and supplier collaboration.