Senior SAP HCM Consultant – Brownfield Migration
Houston, TX - Onsite 100%
Duration: 6 to 8 Months
SAP S/4HANA Brownfield Migration (ECC → S/4HANA)
12+ Years | SAP HCM with US Payroll
Role Overview
The Senior SAP HCM Consultant will play a critical role in the SAP S/4HANA Brownfield Migration program, providing deep functional expertise across Organizational Management (OM), Personnel Administration (PA), US Payroll, and Benefits Administration. The consultant will ensure business continuity, statutory compliance, and data integrity while transitioning the existing SAP ECC HCM landscape to S/4HANA.
This role is focused on minimizing business disruption, validating retained configurations, addressing HCM specific simplifications, and ensuring payroll and benefits processes operate seamlessly post conversion.
Key Responsibilities
- Brownfield Migration Leadership
- Serve as the functional lead for the SAP HCM workstream in an ECC to S/4HANA brownfield conversion
- Assess existing SAP ECC HCM configurations and determine retain vs. remediate vs. retire decisions
- Lead impact analysis for S/4HANA simplification items and HCM technical adaptations
OM, PA & Organizational Continuity
- Validate existing organizational structures, positions, jobs, and reporting relationships post conversion
- Ensure personnel administration processes and infotypes function as is or with minimal remediation
- Support testing and validation of personnel actions and cross module dependencies
US Payroll Assurance
- Ensure end to end US Payroll continuity with zero disruption during and after migration, including:
- Payroll schemas, PCRs, and wage types
- Federal, State, and Local tax configuration
- Retroactive payroll, off cycle payments, and year end processing
- Lead payroll parallel runs to confirm ECC vs. S/4HANA result parity
Benefits Administration Continuity
- Validate existing benefits configurations, including:
- Health, welfare, retirement, and insurance plans
- Enrolment rules and life event processing
- Integrations with third party benefits providers
- Ensure open enrolment and ongoing eligibility processing are unaffected by the migration
Lead and coordinate:
- Unit testing and integration testing for SAP HCM
- Payroll comparison and reconciliation cycles
- User Acceptance Testing (UAT) with client HR and Payroll teams
- Ensure defects are analysed with a migration first mindset (no unnecessary redesign)
