Payroll Transformation Project Manager

Sumer is a fast-growing professional services firm that is dedicated to championing small and medium businesses and helping communities prosper, right across the UK and Ireland. We’re at a unique point in our journey: the excitement of a scale-up combined with the stability of a growing professional services group. This is a chance to join us at the ground floor, shape the future, and make a real impact. As Project Manager – Payroll Transformation, you will play a pivotal role in the successful delivery of Sumer ’s payroll transformation programme, including the rollout of a new Payroll solution across multiple business units. This is a critical role supporting one of Sumer ’s most business-critical service lines. You will work closely with Payroll leaders, hub teams, Technology, Procurement, Finance, Learning & Development and external vendors to ensure the migration is well planned, tightly governed and delivered with minimal operational disruption. The role will focus on coordinating the end-to-end payroll migration plan, managing dependencies, supporting testing and training readiness, driving issue resolution and ensuring each hub is prepared for parallel run, go-live and transition into business as usual. This is a 18-month fixed term contract position, reporting directly into the Strategy and Integration Director. Key Responsibilities Lead the planning, governance, and delivery of the payroll migration programme across Sumer hubs and spokes. Work closely with Payroll teams to understand current processes, operational requirements and migration readiness. Develop and manage detailed project plans, timelines, milestones, risks, dependencies, budget and resource allocation. Coordinate hub-by-hub migration activity, ensuring rollout sequencing is clear and realistic. Coordinate with Technology, Procurement and third-party providers to ensure system, contract and implementation dependencies are managed effectively. Support the planning and delivery of user testing