Board of Directors

Voting Directors

Steven W. Riebel

Mr. Riebel has served as chairman of the board of ATX since 1994, when he co-founded the company. He served as chief executive officer of ATX from 1994 until 2000. Previously, he was chief financial officer and a board member of Data Race, Inc., a telecommunications equipment manufacturer. At Data Race, Mr. Riebel played a leading role in the company's initial public offering. Mr. Riebel served as chief financial officer of BioNumerik Pharmaceuticals, Inc., from 2001 to 2007. He received a bachelor of science degree in accounting from Long Island University and received his M.B.A. from the University of Pittsburgh.

Dr. James R. Leininger

Dr. Leininger is a co-founder of ATX and has served as a director since its incorporation in November 1994. Dr. Leininger founded Kinetic Concepts, Inc., a manufacturer of special-purpose therapeutic beds and wound care devices in San Antonio, Texas, in 1975, and served as chairman of the board for this publicly traded company until 1997. Dr. Leininger is an investor and director in numerous business enterprises. Dr. Leininger and Thomas W. Lyles, Jr. (below) currently serve as Dr. Leininger's designees. Dr. Leininger received his medical degree from the Indiana University School of Medicine.

Thomas W. Lyles, Jr.

Mr. Lyles has served as a director since 1996. He is currently the president and general counsel of Mission City Management, Inc., a private holding company for various operating entities and investments. He is responsible for all executive management, including profit and loss responsibility, and legal aspects of the company. He has held this position since 1990. Prior to this position, he worked as general counsel for Environmental Delivery Systems, Inc., and as a senior associate attorney in Dallas specializing in commercial transactions, institutional lending law, partnerships and income-producing real property. Mr. Lyles received alaw degree from the Southern Methodist University School of Law and a bachelor's degree in business administration from Texas A&M University. He is also a Certified Public Accountant.

Steven A. Millstein

Mr. Millstein began serving ATX as a member of the board of directors and as president and chief operating officer in August 1999 upon ATX's acquisition of Protection One's Mobile Services Group. He was promoted to the position of chief executive officer in June 2000. Prior to joining ATX, Mr. Millstein served as president of Protection One Mobile Services Group, a telematics services company. He served in this capacity from November 1997 until August 1999. A veteran of nearly 30 years in the telecommunications industry, Millstein held various marketing, sales, finance, and government affairs positions with AT&T and Southwestern Bell. In 1987, he became vice president of marketing for Southwestern Bell Mobile Systems, a nationwide cellular carrier, and in 1990, directed marketing to large business customers for Southwestern Bell Telephone Company. Mr. Millstein holds a law degree from Washburn University in Topeka, Kansas, and a bachelor's degree from the University of Kansas.

James M. Mansour

Mr. Mansour became a director of ATX in June 2000. He founded National Telecommunications of Austin in July 1984, and National Telecommunications of Florida in 1991, both of which were sold in 1991 and 1998, respectively. He is also chairman and serves as a director for Grande Communications, a Texas-based communications company providing residential and business customers with high-speed Internet, local and long-distance telephone, and digital cable services over a single network. From March 2001 until November of 2003, he served as the chairman and chief executive officer of Clearwire Technologies, a leader in the fixed wireless MMDS market, which was recently purchased by FLUX LLC. Mr. Mansour holds a law degree from Tulane University and received his bachelor of business administration degree in accounting from Millsaps College in Jackson, Miss.

Huw Medcraft

Mr. Medcraft has been a director since July 2007 and serves as one of the designees on the ATX board for Vodafone Deutschland, GmbH. He is currently business integration director for Vodafone UK’s Enterprise Business Unit. Mr. Medcraft previously held director roles at Vodafone and its subsidiaries within New Product Development (Business Marketing), Product Management & New Product Development, Vodafone Live!, and IT for Connect & Prepay Customer Services. Prior to Vodafone, he was group IT director for Dial Holdings, a wholly owned subsidiary of Barclays Bank PLC, and head of Product & Technology Development for Galileo UK, a wholly owned subsidiary of British Airways. Mr. Medcraft holds a higher national diploma in electronics from Thames Valley University (U.K.) and completed the Executive Leadership Programme at Ashridge Business School in Hertfordshire (U.K.).

Jeff Bloszies

Mr. Bloszies has been a director since January 2007 and serves as one of the designees on the ATX board for Vodafone Deutschland, GmbH. He currently serves as president and chief financial officer for Vodafone Americas Inc. With more than 20 years of telecommunications industry experience, Mr. Bloszies has held positions as Vodafone Group Plc’s Finance executive for Vodafone Americas/Africa/China/India, director of Financial Planning and Strategy for Vodafone Americas Inc., and chief financial officer for Vodafone Satellite Services Inc. Prior to Vodafone, he was director of Strategy and Analysis for AirTouch International and AirTouch Cellular, and director of Financial Planning and Analysis for AirTouch Communications. Mr. Bloszies holds a degree in mathematics from Pomona College in Claremont, Calif.

Non-voting, Advisory Directors

Mahinder P. Chugh

Mr. Chugh began serving as an advisory director in October 2004. Mr. Chugh is presently the chief executive officer (US Operations) of Tata Auto Comp Systems. Prior to joining Tata, he was the president and chief executive officer of Super-Max Corporation U.S.A., from October 2001 to January 2005. Prior to joining Super-Max, Mr. Chugh was a partner at Ernst & Young, where he served as the head of Corporate Finance and Mergers and Acquisitions in India from 2000 to October 2001. Prior to joining Ernst & Young, Mr. Chugh served as director and head of Corporate Finance at Lazard India Limited from 1997 to 2000. Mr. Chugh received his bachelor of science degree in chemistry from Fergusson College in Pune, India, and his MBA from the University of Pune.

Michael Kaufman

Mr. Kaufman began serving as an advisory director in October 2004. Mr. Kaufman is an investor and business consultant. He retired from SBC Corporation in July 2000, where he served as president, SBC-Prodigy Transition beginning in December 1999. From September 1997 through November 1999, he served as president of Pacific Bell's Consumer Markets Group, where he was responsible for all consumer sales and customer service for the state of California. He is presently serving as director and chair of the compensation committee of the board of Monster Worldwide, Inc., as well as a member of its audit committee. He has served on the Monster board since 1997. Mr. Kaufman holds bachelor of business administration and M.B.A. degrees from the University of Wisconsin.

Ernest H. Pomerantz

Mr. Pomerantz began serving as an advisory director in October 2004. Mr. Pomerantz serves as a managing director of StoneWater Capital, LLC, a funds management company focused on fundamental investing in Asia and North America. Prior to StoneWater, he was a managing director of MESA Partners, LLC, from August 2000 through March 2005. He also serves on the board of directors of The Cobalt Group, Inc., where he has held that position since October 1998. Prior to joining MESA, Mr. Pomerantz served as senior advisor from January 2000 through June 2000, and managing director from January 1982 to December, 1999 at Warburg Pincus.

Mr. Pomerantz is an investor and director in numerous business enterprises, including serving as an advisory board member of The Hendrick Companies, LLC, which, among other businesses, owns and operates the Hendrick Automotive Group, a network of approximately 60 automotive dealerships. Mr. Pomerantz holds a bachelor of science degree from Rensselaer Polytechnic Institute, an master's degree from the University of Southern California/London School of Economics, and an M.B.A. from New York University.