Payroll Transformation Specialist - Contract, On-site, London/Essex We''re hiring a hands-on Payroll Transition Specialist for a leading global fintech to deliver complex payroll transformation across EMEA. This is a delivery role, not governance or PMO. Based on-site in London/Essex, you''ll work directly with payroll teams, vendors and stakeholders to take two major programmes through to stable go-live: Payroll vendor changes in Belgium, Germany and the Netherlands Migration of Germany''s ADP Streamline payroll to ADP Celergo What you''ll own: End-to-end payroll testing - strategy, detailed test scripts, execution and defect resolution Parallel runs, reconciliation and sign-off ahead of go-live SOPs, procedures and operational documentation Training internal payroll teams on new platforms, processes and country legislation Embedding controls: approval frameworks, reconciliation, audit-ready documentation What we need - please only apply if you meet the first three: Strong operational payroll expertise in Germany - essential Experience with Belgium and/or Netherlands payrolls - essential Proven hands-on experience delivering payroll transitions or implementations - essential ADP Celergo experience Deep knowledge of gross-to-net processing, statutory reporting and payroll controls Practical experience of payroll testing, managing multiple transitions at the same time, data validation and vendor migration Able to drive delivery independently in a fast-moving environment ..... full job details .....