Serve as the primary functional expert for the enterprise GTN forecasting and planning platform across all Market Access workstreams, including GTN Channel Forecasting, Accrual & Reserve Analysis, and Pre-Deal and Post-Deal Analytics models, with deep knowledge of model mechanics, calculation logic, and data flows. Define and maintain the reporting framework for the platform, determining the appropriate output views, report structures, and dashboard components needed to support monthly GTN reviews, rolling forecast cycles, and finance reporting requirements, ensuring leadership has the right information in the right format.