Join a dynamic transformation initiative within a leading organization based in Brussels. This long-term project aims to modernize and optimize HR and payroll systems, processes, and data flows across multiple business units. As a freelance HR Payroll Business Analyst, you'll play a pivotal role in bridging business needs with technical solutions, ensuring seamless delivery and stakeholder alignment. Key responsibilitiesLead business analysis for HR and payroll transformation workstreamsGather, document, and validate business requirements from HR, Finance, and IT stakeholdersMAP current payroll processes and identify gaps, inefficiencies, and improvement opportunitiesCollaborate with cross-functional teams to design future-state processes and system integrations Required skills & experienceProven experience as a Business Analyst in HR and payroll transformation projectsStrong understanding of Belgian payroll legislation and HRIS systemsExperience with payroll platforms (e.G., SAP HR, Workday, ADP, SD Worx, etc.)Fluent in English; French or Dutch is a strong advantage