Associate Mark P. Hanson joined Keystone Capital in 2005. Prior to Keystone, Mark was an Associate with the investment banking group of Duff & Phelps, LLC, where he focused on middle market mergers and acquisitions across a variety of industries, including professional services and specialty manufacturing and distribution.    Mark also worked as an Investment Analyst with the O'Connor Partners Investment Office in Chicago, evaluating private equity and venture capital fund investments for a group comprising the former general partners of the derivatives trading firm O'Connor & Associates. Education University of Chicago; BA, 2001 Chartered Financial Analyst