• Execute data extractions from SAP ECC using SAP Data Services (BODS) • Query and analyze source and staging data using SAP HANA SQL • Build, maintain, and optimize dataflows, workflows, and extraction jobs • Perform source data analysis and data profiling to identify data quality issues • Perform source to target field-level data mappings • Apply transformation rules, derivations, and validations within SAP Data Services • Translate functional mapping specifications into executable ETL logic • Load master and transactional data into SAP S/4HANA using Migration Cockpit and LSMW. • Execute mock loads and support cutover load activities • Analyze load errors, correct data issues, and reprocess loads as required • Validate data across source systems, staging, and S/4HANA targets • Reconcile record counts, balances, and key attributes based on defined validation criteria • Support defect resolution and retesting during mock cycles • Identify data quality issues such as duplicates, missing values, and invalid formats • Support cleansing activities in coordination with business data owners • Implement data correction logic within SAP Data Services where applicable • Support mock load cycles, dress rehearsals, and production cutover execution • Execute data loads according to defined load waves, object sequencing, and cutover schedules • Perform root-cause analysis of load and validation errors across BODS, Migration Cockpit, and HANA layers • Maintain and update mapping specifications and transformation logic documentation • Track, analyze, and remediate data defects using defined defect management processes • Validate data readiness prior to load execution (completeness, format, dependencies) • Work with functional teams to resolve data issues tied to configuration or business rules