Payroll & Expenses Officer (Workday/Payroll Transition Experience Required) Part-time – 3 days per week (on-site) 6-month fixed-term contract Hayes, Middlesex I am working with a leading client in their field to recruit a part-time Payroll & Expenses Officer to support the finance team during a key period of transition. This role is based at their UK Head Office in Hayes and requires on-site working 3 days per week for a 6-month contract. This is an excellent opportunity for an experienced payroll professional who has either worked with Workday or has been involved in transitioning payroll systems, ensuring a smooth and compliant process. You’ll be responsible for running payrolls from start to finish, supporting system improvements, and ensuring HMRC compliance by auditing and validating historical payroll data. The Role: Own and manage two payrolls, ensuring timely and accurate processing each period Act as the first point of contact for payroll queries across the business Work closely with HR and the Finance Manager on payroll processing, expenses, and system enhancements Play a key role in payroll system transition activities, ensuring data accuracy and compliance during the move to Workday (or from another system) Audit historic payroll to ensure HMRC compliance and rectify any discrepancies Process employee expenses in line with company policy What We’re Looking For: Proven payroll experience, managing payrolls from start to finish Experience using Workday or involvement in transitioning payroll from one system to another Strong understanding of HMRC payroll compliance and confident in identifying/reporting discrepancies Proficient in Excel and Microsoft 365 Detail-oriented, organised, and proactive approach to work Excellent communicator and team player Able to work on-site in Hayes 3 days per week Immediately available or available on short notice preferred Key Responsibilities: Process payroll and BACs payments accurately and on time Maintain accurate payroll records and data Reconcile payroll and investigate discrepancies Liaise with HMRC and external auditors as required Prepare payroll reports and assist with statutory submissions such as P11Ds and PSA Process employee expenses, both cash and credit card claims