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Biography PhotoLawrence e. Mock, Jr.
Chairman of the Board


Lawrence E. Mock, Jr., our Chairman of the Board, is currently Managing Partner of Navigation Capital Partners, Inc., an Atlanta-based private equity firm which he founded in partnership with Goldman Sachs in 2006. From 1995 to 2006, Mr. Mock served as President and Chief Executive Officer of Mellon Ventures, Inc., which he founded in partnership with Mellon Financial Corporation, to make private equity and venture capital investments in operating companies. From 1983 to 1995, he was founder and Chief Executive Offi cer of River Capital, Inc.

Rayford Wilkins, Jr.
Special Advisor to the Board


Rayford Wilkins, Jr., our Special Advisor, served as Chief Executive Officer of AT&T Diversified Businesses and Chairman and President of AT&T International. Prior to these positions, he served as Group President Marketing and Sales. In addition, he occupied various positions associated with the wireless industry at SBC Group and has held several leadership roles in his more than 30-year career at AT&T and its predecessor companies. Mr. Wilkins is currently a director at Morgan Stanley, Valero Energy and Caterpillar.

Jose Mas
Director


Jose Mas has served as a director and Chief Executive Officer of MasTec since 2007. MasTec is a leading infrastructure construction company operating mainly throughout North America across a range of industries. MasTec’s primary activities include the engineering, building, installation, maintenance and upgrade of communications, energy and utility infrastructure, such as: wireless, wireline/fiber, satellite communications and customer fulfillment activities; petroleum and natural gas pipeline infrastructure; electrical utility transmission and distribution; conventional and renewable power generation; and industrial infrastructure. As of March 31, 2017, MasTec had over 18,500 employees and 500 locations, and generated over $5.1 billion in revenue in 2016, more than five times greater than its 2006 revenues. Mr. Mas was also appointed to the Board of Directors of Helmerich & Payne, Inc. on March 1, 2017. Mr. Mas holds a Master of Business Administration and Bachelor of Business Administration degree from the University of Miami. We believe that Mr. Mas is well qualified to serve as a director due to his extensive experience in serving as Chief Executive Officer of a public company focused on serving the wireless telecommunications industry nationally and his broad network of contacts.

Biography PhotoU. Bertram Ellis, Jr.
Director


U. Bertram Ellis, Jr. has served as the Chairman and Chief Executive Officer of Ellis Capital, a diversified investment firm, since 1984. In addition, Mr. Ellis was the Founder and Chief Executive Officer of ACT III Broadcasting from 1986 to 1991, which sold for $530 million and Ellis Communication from 1993 to 1996, which sold for $840 million. Mr. Ellis holds a Master of Business Administration from the University of Virginia Darden Business School and a Bachelor of Arts from the University of Virginia. We believe Mr. Ellis is well qualified to serve as a director due to his extensive experience in serving as Chief Executive Officer in the telecommunications industry and his broad network of contacts.

Suzanne Shank
Director


Suzanne Shank has served as Chairman, Chief Executive Officer and majority owner of Siebert Cisneros Shank & Co., a full-service investment bank that has managed or co-managed over $2 trillion in transactions, since 1996. Mrs. Shank holds a Master of Business Administration from the Wharton School at the University of Pennsylvania and a Bachelor of Science from the Georgia Institute of Technology. We believe Mrs. Shank is well qualified to serve as a director due to her extensive experience in investment banking.

Biography PhotoKarl Krapek
Director


Karl Krapek has served as the Lead Director at Prudential Financial, Inc. since 2014, and a Director since 2008, and Director of Northrop Grumman Corporation since 2008. From 2002 to 2009, he was the President and Chief Operations Officer of United Technologies Corporation, or UTC, which has a market capitalization of approximately $90 billion. Mr. Krapek has served as an Executive Vice President of UTC since 1997 and as a Director of UTC from 1997 to 2007. Mr. Krapek holds a Master of Science from Purdue University and Bachelor of Science from Kettering University. We believe Mr. Krapek is well qualified to serve as a director due to his extensive experience on boards and in leadership positions of public companies.

Biography PhotoDennis Lockhart
Director


Dennis Lockhart recently retired from his position as president and Chief Executive Officer of the Federal Reserve Bank of Atlanta, a position he held from 2007 to 2017. Earlier, he was a professor at Georgetown University, School of Foreign Service, from 2003 to 2007. Prior to this, he held senior positions at Heller Financial Inc. and Citicorp (now Citigroup). Mr. Lockhart holds a Master of Arts from Johns Hopkins University and a Bachelor of Arts from Stanford University. We believe Mr. Lockhart is well qualified to serve as director due to his extensive experience in banking and finance.

Biography PhotoDr. Klaas Baks
Director


Dr. Klaas Baks is the Co-Founder and Executive Director of the Emory Center for Alternative Investments, which was formed in 2008. He also serves as the Atlanta Chair of TIGER 21, which is a peer-to-peer network of high net worth wealth creators, since 2014. In addition, he has been an Associate Professor in the Practice of Finance at Emory University’s Goizueta Business School since 2002. Dr. Baks has a Doctoral degree from the Wharton School at the University of Pennsylvania and a Masters of Arts degree from Brown University. We believe Mr. Baks is well qualified to serve as director due to his extensive experience in banking and finance.