Our Leaders


John R. Sammarco

(703) 626-0221

"Although today’s business problems are increasingly complex, there are relatively simple solutions available if you are open to change."

John is committed to helping groups make better decisions. He has over thirty-five years of experience leading, managing, and consulting to top public and private sector organizations such as Lockheed Martin Corporation, Oracle Corporation, America Online, Accenture LLP, Bank of America, Fannie Mae, GMAC Financial Services, the U.S. Department of Energy, and the U.S. Treasury Department’s Office of the Comptroller of the Currency (OCC). At the OCC, he led numerous high-profile business process improvement initiatives and has specialized in IT investment management.

He founded Definitive Business Solutions in 2003, which provides world-class group decision-making solutions. In 2016, he pioneered development of Definitive Pro® Business Analytics to help organizations build consensus and make complex multi-criteria decisions. He has been awarded three U.S. patents in the field of group decision-making.

In the evenings, John serves as an adjunct professor for the Department of Decision, Operations and Information Technologies (DOIT) within the Robert H. Smith School of Business, where he teaches consulting analytics and system analysis and design. He also serves as the AVP of Strategy for the Project Management Institute’s (PMI) Washington D.C. chapter, where he has been a certified project management professional (PMP) since 2001. John has a Master of Science degree in Systems Management from the University of Denver, and a Bachelor of Science degree in Computer Science/Mathematics from Union College in Schenectady, N.Y.

Chief Technology Officer

Greg Potteiger

(703) 919-3775

"Methodology alone is not enough for a world-class decision-making process. Technology enables stakeholder engagement, makes information available to decision makers, and increases the speed of decision making."

Greg has over 25 years of experience in information technology. A graduate of the U.S. Naval Academy, Greg served 7 years as a Nuclear Qualified Submarine officer. After leaving the Navy he worked for Kaiser Permanente where he spearheaded their first intranet applications. He then founded Bowwave Technology which he owned and operated for 20 years. Greg has designed, developed and managed enterprise wide applications as well as unique intranet / internet solutions. He has also architected cloud-based and on-premise systems, and has led development teams through the entire software development lifecycle.

Since 2016, Greg has architected, designed, and developed Definitive Pro and Definitive Choice decision support systems, and has supported delivery of engagements involving technology decisions,

In addition to a bachelor’s degree in Systems Engineering from the U.S. Naval Academy, Greg also has an MBA and a Master’s in Information Technology from the University of Maryland.