Donald Clarke has served as a member of our Board since May 2014. Mr. Clarke currently serves as the Chief Financial Officer for Plex Systems, Inc., a privately held cloud technology company, and previously also held the position of its interim Chief Executive Officer from October 2017 through November 2018. Prior to joining Plex, from March 2008 to March 2013, he served as the Chief Financial Officer for Eloqua, Inc., a then publicly-held marketing automation company. Prior to working at Eloqua, Mr. Clarke served as Chief Financial Officer for Cloakware, Inc., a privately-held security solutions company, from August 2006 to February 2008 and for Visual Networks, Inc., a then publicly-traded application and network management solutions company, from July 2004 to March 2006. He is a member of the American Institute of Certified Public Accountants and holds a B.S. in Accounting from Virginia Polytechnic Institute and State University.