Senior Data Analyst

Agency : Havas Creative Job Description : We are seeking a Senior Data / Systems Analyst to support global operational and finance reporting across multiple business systems. This role will own reporting requirements, data definitions, integrations, and data models that underpin a large and growing portfolio of management and operational reports. The successful candidate will act as the bridge between business stakeholders, source systems, and the Power BI reporting team, ensuring a single source of truth, consistent KPIs, and high quality, reliable data across regions and countries. This is a hands on analytical role, focused on requirements definition, data modelling, integration design, and governance, rather than report development. Own end‑to‑end integration specifications for all global reports Define how data flows between systems and into the reporting layer Validate and reconcile data across source systems and reporting outputs Act as the central point of ownership for reporting logic and assumptions Own assumptions, calculations, and logic behind all reported financial metrics Ensure reports support finance use cases such as: Management reporting Actuals vs budget vs forecast Project and margin reporting Revenue, cost, and profitability analysis Requirements & Stakeholder Management Elicit, document, and manage clear reporting requirements from global and local stakeholders Translate business questions into structured data requirements for the Power BI reporting team Support requirements definition for individual reports and dashboards Challenge local requirements to ensure consistency, scalability, and alignment with global standards Partner with Finance leadership, regional finance teams, FP&A, and Controlling to define clear reporting requirements Translate finance questions into structured data requirements for the Power BI team Data Definitions & Governance Own data definitions, KPI definitions, field mappings, and calculation logic Establish and enforce reporting standards (naming conventions, metrics, dimensions, hierarchies) Ensure consistent KPI definitions across countries, regions, and business units Prevent conflicting numbers and “multiple versions of the truth” Data Modelling & Architecture Design and maintain reporting data models (e.g. star schemas, relationships, measures) Define grain, dimensions, facts, and aggregation logic Partner with Power BI specialists to ensure models support performant and scalable reporting Data Integration & Quality Connect and reconcile data from multiple systems (e.g. ERP, HR, project management tools, finance systems) Work with messy, incomplete, and non‑aligned data sources , identifying gaps and inconsistencies Validate data quality, completeness, and accuracy before and after go‑live Define rules for data transformations and harmonisation Issue Resolution & Continuous Improvement Support investigation and resolution of data and reporting issues post go‑live Perform root‑cause analysis of discrepancies and work with system owners to resolve issues Identify opportunities to simplify, standardise, and automate reporting data flows Documentation Maintain comprehensive documentation including: Data definitions and KPI dictionaries Field mappings and transformations Report logic and assumptions Data lineage and source‑to‑report traceability Required Experience & Skills Significant experience in a Senior Systems Analyst, Integration Analyst, or Reporting Analyst role Strong background in enterprise reporting and analytics in a global environment Proven experience working with multiple source systems (ERP, HR, project systems, financial systems) Strong understanding of data modelling concepts (star schemas, dimensions, facts, measures) Hands‑on experience defining data requirements for BI tools (e.g. Power BI, Tableau, similar) Excellent ability to work with complex, messy, and inconsistent data Strong documentation and stakeholder communication skills Desirable Experience in finance or operational reporting in a multi‑country organisation Knowledge of data governance and KPI standardisation frameworks Familiarity with Power BI data modelling and DAX concepts (requirements‑level, not development) Experience working with global reporting programmes or transformations Key Competencies Highly structured and detail‑oriented Strong analytical and problem‑solving skills Able to challenge assumptions and drive data clarity Comfortable operating as the single point of ownership for definitions and logic Able to balance global standards with local reporting needs Contract Type : Permanent Here at Havas across the group we pride ourselves on being committed to offering equal opportunities to all potential employees and have zero tolerance for discrimination. We are an equal opportunity employer and welcome applicants irrespective of age, sex, race, ethnicity, disability and other factors that have no bearing on an individual’s ability to perform their job.