Management
David Gelbaum, CEO
Since 2002, Mr. Gelbaum has been a private investor. From 1989 until 2002, he performed quantitative modeling for stock price returns and derivative securities for TGS Management, and from 1972 until 1989 he worked at Oakley & Sutton in a similar capacity. Mr. Gelbaum is a trustee of The Quercus Trust.
Shelley Hollingsworth, Chief Financial Officer
Ms. Hollingsworth has over 25 years of experience in all aspects of finance, accounting and administration in both private and public companies. She has been with Entech Solar, Inc. since June 2009, including most recently as Director of Financial Reporting. Ms. Hollingsworth will also continue to serve as our Treasurer. From 2007 to 2009, Ms. Hollingsworth was an independent contractor providing finance and accounting services for a variety of companies including Entech Solar, Inc. Ms. Hollingsworth previously served as controller for Holigan Management Group, Inc. from 2004 to 2007. Ms. Hollingsworth holds a BBA from the University of Texas at Arlington and is a certified public accountant in the state of Texas.
Clay Stevenson, VP of Operations
Mr. Stevenson joined Entech Solar, Inc. in September of 2008 with an extensive background in semiconductor product engineering, manufacturing and testing. Mr. Stevenson successfully managed the Entech Solar’s SolarVolt™ low concentration CPV product through the International Electrotechnical Commission (IEC) 62108 and draft standard IEC 62688 certification testing. He is a member of ANSI US tag 82 standards development organization and the IEC work group 7 working towards the development and revision of IEC standards for CPV products. Mr. Stevenson received his B.S. in Physics from McMurry University, and MS in Engineering from Texas Tech University. Mr. Stevenson has one U.S. patent for the invention of a MEMs semiconductor device and the process for manufacturing the same.
Robert R. Walters, VP of Marketing
Dr. Walters was co-founder and VP of Corporate Business Development for ENTECH and now serves as VP of Marketing for Entech Solar. Prior to his 25 years in marketing and 35 years in solar energy, Dr. Walters was the Manager of Advanced Technology Systems at E-Systems, Advanced Technology Center, and taught engineering at the University of Oklahoma. Dr. Walters has served on advisory committees for the U.S. DOE, on the Texas Higher Education Coordinating Board, and on the Texas Energy Coordination Council. He received his BS in Aerospace and Mechanical Engineering, and an MS and Ph.D. in Engineering from the University of Oklahoma.
