Mr. Barrett A. Toan served as an Advisor of Evolv, Inc. Mr. Toan has been an Advisor to the Board at Gateway EDI, Inc., since November 2009. Mr. Toan served as the Chairman of Express Scripts Inc., at CuraScript PBM Services, Inc. from November 2000 to May 24, 2006 and March 1992 to April 1, 2005 respectively. Mr. Toan has more than 32 years of healthcare industry experience and more than 29 years of management experience, including more than 20 years as the Chief Executive Officer. Mr. Toan served as the President and Chief Executive Officer of Express Scripts from 1989 to 2005. Mr. Toan is one of the nation's foremost executives in the pharmacy benefit management (PBM) industry. Prior to joining Express Scripts, he served as the Chief Operating Officer and Executive Director of Sanus Corps Health Systems Inc. Before joining Sanus, he served in the public sector in a variety of roles, including the Director of Missouri's Department of Social Services. He is employed at Paragon Financial Corp. Mr. Toan has been the Chairman of Sigma-Aldrich Corporation since November 14, 2010. He serves as a Director of Graphic Surgery, LLC. He serves as a Director of Sigma-Aldrich Company Limited. He has been an Independent Director at Sigma-Aldrich Corporation since November 2001. He served as an Independent Director of Genworth Financial Mortgage Insurance Pty Ltd since July 2006. He served as a Director at Aristotle Holding, Inc. until May 2011. He served as a Director of Express Scripts Inc., from October 1990 to May 2011. Mr. Toan served as an Independent Director of Genworth Financial Inc., from July 2006 to May 12, 2010. He served as Presiding Director for Sigma-Aldrich Corporation since May 2009. He served as a Director of United States Cellular Corp., from 2001 to February 5, 2004. He served as a Director of U.S. Cellular, Olin School of Business, Missouri Historical Society and Kenyon College. Mr. Toan served as a Member of Executive Council at Prematics, Inc., since July 2006. His numerous awards include being named Inc. Magazine's Entrepreneur of the Year. He earned his MBA from the wharton school of the University of Pennsylvania. Mr. Toan holds a master's degree from the University of Pennsylvania's The Wharton School of Finance and Commerce and a bachelor's degree from Kenyon College.                

 pathology