David is a Senior Program Manager on the Excel team at Microsoft. He loves Excel because it offers endless possibilities for end users to create, analyze, and share quantitative models or applications. David has worked on several Excel features, including Copilot, PivotTables, data types from Power BI, external links for web, formula errors, and file performance and reliability, among others. David's experience with Excel started as an end user - before joining the Excel team he was building complex spreadsheets as a supply chain planner on the Microsoft Surface team, and as a management consultant before that.