Job Title: HRIS Data Migration Specialist
Location: Brussels, Belgium
Duration: 29/06/2026 - 31/01/2027
Languages: English, French, Dutch
Mode: Hybrid
Job Description
We are seeking a skilled HRIS Data Migration Specialist to lead the end-to-end migration of HR data from SAP R/3 HCM (PA/OM/Time/PY) to SAP SuccessFactors Employee Central and S/4HANA Time. This role is critical to ensuring data integrity, compliance, and operational continuity during the HRIS transformation roadmap from Success.
Key Responsibilities
Migration Planning & Strategy
* Define and document the data migration strategy & plan aligned with the SF EC and S/4HANA HCM rollout.
* Establish data selection principles (what moves vs. what is archived/destroyed), aligned with legal, regulatory, works council, information security, and GDPR requirements.
* Develop the data object inventory and field-level mapping specifications
* Define archiving and defensible data destruction approaches for out-of-scope or redundant data, with audit trails and approvals.
* Set up governance: RACI, decision rights, issue/risk management, status reporting, and executive-ready progress dashboards
* Collaborate with HR & IT and business stakeholders to define scope, timelines, and dependencies.
Data Discovery & Mapping
* Inventory source systems (SAP ECC HCM and non-SAP), objects, infotypes, tables, and custom fields; determine target structures in SuccessFactors (e.g., Employee Central, Recruiting, Onboarding) and S/4HANA (e.g., Finance-related HR data, HCM compatibility or integrations as applicable).
* Lead the data mapping and transformation logic definition, including value mapping, code translations, derived fields, joins, historical vs. current snapshots, and effective dating.
* Produce mapping specifications and governed transformation rules (with version control) for all in-scope data sets. Data Extraction, Transformation & Loading (ETL) Use data conversion tools, such as Spenifex, Data Conversion Manager or other to setup the data mapping, data comparison and load the data from the source to target
* systems.
* Build repeatable, parameterized ETL/ELT pipelines for extract, cleanse, transform, and load.
* Extract legacy data from SAP R/3 HCM modules (PA, OM, Time, Payroll).
* Cleanse, transform, and map data to SuccessFactors EC and S/4HANA HCM structures.
* Use SAP Business Integration Builder (BIB), SAP Cloud Platform Integration (CPI) and data migration tools for replication and transformation.
* Implement data quality rules, exception handling, logging, and reconciliation checks (e.g., counts/balances, hash totals, key field completeness).
Mock Loads & Data Quality Uplift
* Plan and run multiple mock loads (e.g., ML1–ML3) across environments; track defects, root causes, and trend improvements.
* Drive data cleansing at source (with HR data owners) and within transformation layers; establish golden source decisions and survivorship rules for consolidated records.
* Produce data quality scorecards and measurable KPIs (completeness, validity, uniqueness, consistency, timeliness).
* Manage cutover dry-runs, timing simulations, and performance tuning for load windows. Testing & Controls
* Define and execute E2E testing for migration objects: unit tests, SIT, UAT support, and parallel run/payroll impact checks where relevant.
* Support User Acceptance Testing (UAT) and parallel runs to ensure data accuracy
* Implement reconciliation and sign-off controls with business owners: pre-/post-load controls, sampled record validation, and audit evidence.
* Ensure privacy-by-design and security-by-design throughout (masking in non-prod, least-privilege access, retention rules).
Cutover & Hypercare
* Build and execute the Cutover Plan for go-live, including freeze windows, sequencing, runbook, roles, checkpoints, back-out criteria, and communications.
* Orchestrate go-live weekend activities, triage, and rapid defect resolution with functional and technical teams.
* Deliver hypercare reconciliation, issue remediation, and handover to operations/support with documentation and knowledge transfer
* Documentation & Governance
* Maintain comprehensive documentation of mappings, transformation logic, and data lineage.
* Ensure compliance with GDPR and internal data governance policies
CONFORMITY CRITERIA
* 7+ years in data migration (at least 3+ in HR data), delivering complex, multi-system migrations at enterprise scale.
* Proven experience in SAP HCM data migration projects, especially involving SF EC and S/4HANA.
* Proven hands-on expertise with data migration tools (eg. Infoporter, Spinifex, DCM), SAP BIB, CPI, IDoc, and OData services.
* SAP Certification in SuccessFactors EC and/or SAP Integration Suite.
* Experience in hybrid SAP HCM landscapes and phased rollouts
* You can express yourself fluently in Dutch, French and English (minimum B2 for all 3)
* Min 3 days per week onsite
EVALUATION CRITERIA
* Knowledge of HR master data, organizational structures, and payroll-relevant data.
* Knowledge of data mapping and transformation logic and techniques
* Knowledge of SAP ECC HCM (e.g., PA/OM, Time, Payroll, Benefits) and data structures (infotypes, clusters), plus exposure to custom Z-tables.
* Knowledge of SuccessFactors EC Datamodel, Object Types and data structures
* Problem-solving capabilities