Reed HR are working alongside a large and well known Not for Profit Organisation based in East London who are recruiting for an experienced HR and Cascade Specialist on an interim basis for initially 2-3 months.This role is hybrid (3 days onsite)Job Summary As the HRIS Cascade Specialist, you will supporting the planning, configuration, and implementation of significant system changes within the HR Information System (Cascade). This role is critical to ensuring the successful delivery of updates and restructuring within the business.Working closely with the internal HRIS Specialist and reporting directly to the Acting Head of People and Culture, you will provide expert knowledge, guidance, and hands-on execution to ensure accuracy, continuity, and efficiency within our HR systems during this period of transition.Key ResponsibilitiesSystem Configuration and ImplementationLead on the planning, design, and configuration of Cascade HRIS changes, particularly those relating to organisational hierarchy and structural updates.Ensure all system modifications are delivered accurately, tested thoroughly, and implemented on schedule.Work collaboratively with HR, IT, and relevant stakeholders to validate data requirements, dependencies, and impacts before changes are deployed.Technical Expertise and SupportServe as the subject matter expert for Cascade functionality, workflow logic, permissions, reporting, and data structures.Provide advanced troubleshooting and resolution support for sy