meet our
Leadership Team

Prior to joining STS, Mark founded Pursant, LLC, a middle-market advisory firm specializing in mergers and acquisitions, private capital market financing, transaction advisory services, and business value enhancement. Since 2010, he and the Pursant team have guided business owners and investors through strategic transactions, exit planning, and complex financial matters. Before Pursant, Mark founded, acquired, operated, and sold more than a dozen businesses across multiple sectors. As CEO of Capital Building Services Group from 1996 to 2009, he made the platform acquisition and grew the company nationwide through acquisitions, divestitures, and organic growth to more than 1,500 employees. The company achieved Inc. 500 status and consistent client retention above 90% before Mark sold it in 2009. That experience shaped his belief that building enterprise value begins long before a transaction, and that buying and selling a business requires a fundamentally different skill set than operating one. 

A Certified M&A Advisor through the AM&AA and a Harvard Business School alumnus, Mark has long been active in the Young Presidents’ Organization (YPO), where he has served as Central US Region Chairman, Chair of the YPO Deal Global Business Network, and Chapter Chair for the Chicago Windy City and Heartland chapters. He is a frequent speaker on middle-market M&A, exit strategy, and deal execution, and has delivered keynotes and sessions for numerous organizations, associations and universities including YPO, Columbia Business School, Northern Illinois University, and the University of Louisville. He also serves on several private company and charitable boards. 

Outside of business, Mark brings that same discipline to health and performance as a world-ranked CrossFit athlete and avid fitness racer. He often draws parallels between fitness and dealmaking, where discipline, consistency, resilience, and preparation ultimately drive outcomes.