SAP S/4HANA Procurement Consultant

We are a Brazilian B2B laboratory services company (healthcare water testing) and a large client recently migrated to SAP S/4HANA Cloud. Since the migration, our purchase order receipt rate dropped, creating a receivables backlog. We need an expert who understands SAP procurement FROM THE SUPPLIER SIDE to help us fix this. IMPORTANT: We do NOT need someone to configure SAP. We need someone who understands how SAP procurement works internally at large companies and can help us, as a supplier, optimize our process and propose changes to our client. The client DOES NOT use a supplier portal yet. Your background should include one or more of: - Worked in procurement / shared services / AP at a company running SAP S/4HANA - Implemented or managed SAP Ariba / Business Network supplier onboarding - Supplier enablement consulting - P2P process optimization in healthcare or similar industries What we need (deliverables): 1. DIAGNOSTIC CALL (1-2 hours): We explain our situation. You ask the right questions and tell us what's actually happening on the SAP side (PO creation, goods receipt, three-way match, invoice verification workflow). We'll share our client's contract and billing data. 2. RECOMMENDATIONS DOCUMENT (3-5 pages): Specific, actionable recommendations we can present to our client's procurement team, including: - Is a blanket PO / outline agreement (ME31K) viable for recurring lab services with variable monthly volumes? How can we optimize the PO during the period? - Should we push for SAP Ariba / Business Network enrollment? - How should we reference PO numbers in our invoices to enable automatic three-way match? - What's the right SAP transaction flow for service procurement (PR - PO - SES - MIRO)? - How do we handle units still being migrated to SAP (currently manual process)? 3. OPTIONAL: Join a call with our client's procurement team to propose the optimizations (huge plus if you can articulate this as a benefit for THEM, not just for us). Context: - Client: Large healthcare company, ~20 legal entities, each requiring individual PO and invoice - Client ERP: SAP S/4HANA Cloud (migrated late 2025, still stabilizing) - Our systems: No SAP. We use a lab management system + electronic invoice platform (NFS-e) + banking API for payment slips - Problem: Client's procurement team isn't issuing POs at the pace of operations. We invoice without PO (at their request), but those invoices get blocked in SAP This is NOT: - An SAP implementation project - ABAP development - A long-term engagement (unless results lead to ongoing advisory) Ideal profile: - Has been inside the SAP procurement machine at a large company (knows the politics, not just the transactions) - Can explain in business terms why blanket POs reduce workload for the client's team - Healthcare / pharma / lab services experience is a strong plus - Portuguese speaker preferred (client communication is in Portuguese), but English-only is fine if expertise is strong Budget: $500-2,000 fixed price (depends on scope) Timeline: 1-2 weeks Start: Immediate