Scott R. Silverman previously served as VeriChip's chief executive officer from August 27, 2009 until VeriChip Corporation's acquisition of Steel Vault Corporation in November 2009, at which time VeriChip changed its name to PositiveID Corporation. Mr. Silverman also served as the chairman of Steel Vault, from January 2006 through November 2009. He was VeriChip's chief executive officer from December 5, 2006 through July 18, 2008, chairman of VeriChip's board of directors from March 2003 through July 18, 2008, and was a member of VeriChip's board of directors from February 2002 through July 18, 2008. He served as the chairman of the board of directors of Digital Angel Corporation (formerly known as Applied Digital Solutions, Inc.), or Digital Angel, from March 2003 through July 3, 2007, and served as chief executive officer of Digital Angel from March 2003 to December 5, 2006, and as acting president of Digital Angel from April 2005 to December 5, 2006. From March 2002 to March 2003, he served as Digital Angel's president and as a member of its board of directors. From August 2001 to March 2002, he served as a special advisor to Digital Angel's board of directors. From September 1999 to March 2002, Mr. Silverman operated his own private investment banking firm. From October 1996 to September 1999, he served in various capacities with Digital Angel, including positions related to business development, corporate development and legal affairs. Mr. Silverman is an attorney licensed to practice in New Jersey and Pennsylvania.

William J. Caragol previously served as VeriChip Corporation's acting chief financial officer from January 2009 until VeriChip Corporation's acquisition of Steel Vault Corporation in November 2009, at which time VeriChip changed its name to PositiveID Corporation. He served as president of VeriChip from May 2007, its chief financial officer from August 2006, and its treasurer from December 2006 through November 2009. Mr. Caragol served as Steel Vault's chief executive officer, president and a member of its board of directors from December 3, 2008 and as acting chief financial officer from October 24, 2008, until it was acquired by VeriChip Corporation in November 2009. Mr. Caragol served as acting chief executive officer of Steel Vault from October 24, 2008 until December 3, 2008 when he was appointed chief executive officer. From July 2005 to August 2006, he served as the chief financial officer of Government Telecommunications, Inc. From December 2003 to June 2005, Mr. Caragol was the vice president of business development and chief financial officer of Millivision Technologies, a technology company focused on security applications. He is a member of the American Institute of Certified Public Accountants and graduated from the Washington & Lee University with a bachelor of science in Administration and Accounting.