Responsibilities Client Finance & Media Financial Management Own development and ongoing management of client budgets Maintain client approvals and supporting documentation to meet audit and compliance requirements Update and manage estimates in SAP to ensure alignment with client-approved scopes Maintain billing, revenue, and pass-through cost tracking tools in Excel Partner with Account and media teams on budgets, actuals, and forecasts to ensure financial accuracy Complete quarterly and annual media reconciliations for active scopes and resolve discrepancies Accounts Receivable (Client Billing Support) Coordinate with billing teams to initiate and process client invoices Provide accurate and complete billing inputs to support invoice creation Review draft invoices for accuracy prior to final issuance Incorporate client-specific requirements and perform manual invoice adjustments as needed Maintain documentation of all invoices issued for tracking and audit purposes Monitor receivable status and follow up on outstanding payments as needed Accounts Payable (Vendor Billing Support) Request vendor purchase orders in SAP and Mediaocean/Prisma Review vendor invoices to ensure accurate PO coding and compliance Submit vendor invoices for processing through SAP or Prisma systems Resolve vendor payment inquiries in a timely manner Qualifications 4+ years of progressive experience in client finance, agency finance, or similar Experience with financial reconciliations, audit support, client billing workflows, budgeting, forecasting, and financial reporting in a fast-paced environment Agency or media finance environment Experience in media billing with hands-on knowledge of Mediaocean/Prisma required Strong attention to detail with a high degree of accuracy in financial data Highly organized, with the ability to manage multiple priorities and deadlines Advanced proficiency in Excel, including: Complex formulas and data analysis Pivot tables and large dataset management Experience working with SAP or similar ERP systems Additional information Our Publicis Groupe motto "Viva La Différence" means we're better together, and we believe that our differences make us stronger. Overview The Client Media Budget Supervisor supports client finance operations and media billing processes, ensuring accuracy, compliance, and efficiency across revenue and vendor workflows.