SAP Data Migration SME for S/4HANA Transformations

About the role

EY is looking for an experienced SAP Data Migration Subject Matter Expert to lead end‑to‑end data migration for SAP S/4HANA transformation programmes. You will work closely with business and IT stakeholders to design, execute and optimise migration strategies while embedding AI‑driven automation to improve data quality and reduce risk.

Key responsibilities

• Lead full lifecycle SAP data migration from ECC to S/4HANA, including planning, execution and cut‑over.
• Define migration strategy covering scope, objects, data sources, tools and timelines.
• Drive data readiness activities such as profiling, cleansing, transformation and validation.
• Conduct data mapping workshops and translate business requirements into technical specifications.
• Manage migration cycles (build, unit test, SIT/UAT, dress rehearsal and cut‑over).
• Partner with Business Data Owners to ensure data quality, governance and sign‑off.
• Oversee data validation, reconciliation and issue resolution across migration phases.
• Apply AI/automation tools to accelerate profiling, cleansing and reconciliation, and identify opportunities for intelligent automation.
• Design migration approaches (Greenfield, Brownfield, Selective Data Transition) and select appropriate tools (LSMW, ETL, custom routines).
• Act as SME advisor to clients and senior stakeholders on migration strategy and risks.

Required profile

• Extensive SAP experience with a strong focus on data migration.
• Proven delivery of full‑lifecycle SAP S/4HANA migration projects.
• Deep understanding of the SAP data migration lifecycle (readiness, transformation, testing, cut‑over).
• Experience working across SAP modules such as FI/CO, MM, SD.

Required skills

• SAP S/4HANA
• SAP ECC
• LSMW
• ETL tools
• Custom migration scripts
• AI/automation tools for data profiling and cleansing
• Data profiling and data cleansing
• Data reconciliation and validation
• Data mapping and anomaly detection
• Code remediation
• SAP FI/CO
• SAP MM
• SAP SD