BI Report Developer - Sage / SQL / Power BI - is required by highly successful and well established manufacturing organisation. 12 month day rate contract, OUTSIDE IR35. Role Overview This new BI Report Developer position will be a key part of the organisation's technology transformation programme. The role will drive the evolution of data analysis and reporting capabilities, supporting business growth and digital transformation across manufacturing, supply chain, and customer engagement. Key Responsibilities * Lead on-site discovery workshops to accurately capture reporting requirements, translating them into technical specifications and success criteria. * Design and build robust dashboards, reports, and live data extracts over Sage X3 and other databases, modelling best practices and governance using Sage Data & Analytics (ZapBI) and Power BI. * Write performant Structured Query Language (SQL) scripts, including complex joins, window functions, and incremental loads. * Apply advanced Microsoft Excel skills (Power Query, complex formulas, pivot tables, VBA/macros) to support ad hoc reporting and Finance’s live data needs. * Implement data validation, reconciliation, and variance analysis to build trust in reported figures. * Create and maintain a calculation/measure dictionary with business definitions, DAX expressions, filters, and caveats. * Optimise dataset performance (column cardinality...