Raúl Zambrano is a senior consultant for The Greeley Company. Previously, Dr. Zambrano served as a senior medical director for Oak Street Health; a CMO for Lutheran Hospital in Fort Wayne, Ind.; for Aurora Healthcare in Kenosha, Wis.; deputy and interim CMO for VISN 7 in Georgia; and the chief of staff at the West Texas VA Health Care System. Dr. Zambrano received his Bachelor of Arts from Columbia University in New York, Master of Science in chemistry from the Massachusetts Institute of Technology, and his MD from the College of Physicians and Surgeons at Columbia University. Dr. Zambrano is board certified in family medicine. He served in the United States Army Reserve from 2001–2012 with four deployments.