Board of Directors
William Yearsley joined the Board of Directors in February of 2020. Mr. Yearsley is a director and interim CEO of Sioux Creek Silica, a limited partner and former operating partner of Lariat Partners Fund One since 2013, an investor and lead outside director at Tri-Arc, LLC, and the primary advisor to an early stage Canadian Company developing new technologies to reduce carbon dioxide emissions from the production of cement. Previously, Mr. Yearsley was the CEO of a publicly traded EPC solar company. From 2007 to 2011, Mr. Yearsley was an endowed professor at the University of Colorado Boulder Department of Civil, Architectural, and Environmental Engineering, and was honored as the top teaching faculty member in 2011. In 1996, Mr. Yearsley co-founded American Civil Constructors and led the company as chairman and CEO until 2007. From 1984 to 1997, Mr. Yearsley was employed by Redland PLC, a FTSE 100 firm traded on the London Stock Exchange, and later in his tenure served as chairman and CEO of the construction materials and non-metallic mining groups. Mr. Yearsley holds a BS in Engineering from Southern Illinois University and a MS in Construction Management and a PhD in Construction Engineering from Colorado State University.