Dr. Greenstein is CEO of the Kaizo Health Companies, a multilocation chiropractic, rehabilitation and wellness practice. He is also the founder of the Kaizo Clinical Research Institute, a 501-c3 which runs clinical studies to identify best practices. Dr. Greenstein, is immediate past Chairman for the Clinical Compass, and the Federation of International Chiropractic du Sport’s World Olympians Scholarship Program Chairman. Dr. Greenstein is also the CEO of Kaizenovate, a technology and consulting firm that helps doctors of chiropractic grow their practices through technology. Dr. Greenstein is a sought out international speaker and consultant, teaching clinical guidelines, leadership, and the business management. Dr. Greenstein sits on multiple advisory boards in healthcare and technology.