BIOGRAPHY Darrell J. Smith Darrell Smith is Chief Executive Officer of HCS Systems. He led an investment group in the acquisition of HCS Systems in 2005. He has 25 years experience in the government professional services marketplace coupled with technology experience in the commercial sector. He previously served as Chief Executive Officer and founder of Milestone Group. Under his leadership, Milestone Group grew from a start-up operation in 1998 to a leading, diversified information technology and professional services company with annual revenues of over $25 million in 2005. Milestone Group was acquired by Anteon Corporation in 2005. Prior to Milestone Group, Mr. Smith served as Vice President and General Manager at ARIST Corporation, where he expanded the company’s service offerings and increased its annual revenues from $0.6 million to $22 million. His prior positions include Program Director at Resource Consultants, Inc., Senior Vice President at Environmental Products Corporation, and Software Developer at Presearch, Inc. Mr. Smith holds both Masters and Bachelors degrees in Mathematics from George Mason University.