Senior Payroll Transition Specialist

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:

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• Payroll vendor changes in Belgium, Germany and the Netherlands
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• Migration of Germany's ADP Streamline payroll to ADP Celergo
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What you'll own:

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• End-to-end payroll testing - strategy, detailed test scripts, execution and defect resolution
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• Parallel runs, reconciliation and sign-off ahead of go-live
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• SOPs, procedures and operational documentation
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• Training internal payroll teams on new platforms, processes and country legislation
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• Embedding controls: approval frameworks, reconciliation, audit-ready documentation
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What we need - please only apply if you meet the first three:

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• Strong operational payroll expertise in Germany - essential
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• Experience with Belgium and/or Netherlands payrolls - essential
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• Proven hands-on experience delivering payroll transitions or implementations - essential
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• ADP Celergo experience
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• Deep knowledge of gross-to-net processing, statutory reporting and payroll controls
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• Practical experience of payroll testing, managing multiple transitions at the same time, data validation and vendor migration
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• Able to drive delivery independently in a fast-moving environment
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German or Dutch language skills and experience with outsourced payroll models and Social Secretaries are a strong advantage.

Contract role, on-site in London/Essex. (inside IR35)