Mike Greenfield

Mike Greenfield co-founded Change Research in 2017 to quickly, affordably, and accurately measure public opinion and enable leaders to better understand the needs of the people they serve. He was the company’s CEO from its founding until May 2022. Mike was PayPal’s first data scientist and built much of the company’s early fraud detection technology he led the data analytics team for LinkedIn as the company grew from 250,000 users to 10,000,000 users. Before starting Change Research, Mike co-founded Circle of Moms, which helped millions of moms find information and support, and TeamRankings.com, which has helped thousands of people win their NCAA Tournament pools. Mike also currently serves as the President of the Board of the Greenfield Foundation. He holds a BS in Mathematical and Computational Science from Stanford University and lives in Palo Alto, CA.