Advanced Energy Industries Inc.

has served as a director since January 2001. Dr. Betz also serves as Chairman of the Company's Compensation Committee. Since August 2005, Dr. Betz has served as President and Chief Executive Officer of Advanced Energy Industries, Inc. Dr. Betz served as Chief Executive Officer of West STEAG Partners from August 2001 until August 2005, as Chairman of the Management Board and Chief Executive Officer of STEAG Electronic Systems AG from January 1996 to July 2001, and as a member of the Management Board of STEAG Electronic Systems AG from October 1992 to July 2001. Dr. Betz served as a member of the Management Board of STEAG AG from January 1997 to July 2001.

Frederick A. Ball currently serves as chief financial officer for Webroot, a software security company. He is also a member of the Board of Directors of Electro Scientific Industries, a provider of photonic and laser systems for micro-engineering applications, and serves as a member of their audit committee. Mr. Ball's past positions include senior vice president and chief financial officer of Big Band Networks, a provider of network platforms for broadband multimedia services. He also held various executive positions at Borland Software Corporation, a provider of enterprise software development solutions, including chief financial officer and executive vice president of corporate development and mergers and acquisitions. In addition, Mr. Ball worked at KLA-Tencor Corporation, a manufacturer of semiconductor equipment, where he served as vice president, mergers and acquisitions, and vice president of finance. Mr. Ball holds a Bachelor of Science degree in accounting and spent 11 years as a CPA at PricewaterhouseCoopers (PwC).

Lawrence D. Firestone joined Advanced Energy in August 2006 as executive vice president and chief financial officer. He was most recently chief financial officer at Applied Films Corporation, a $240 million thin-film deposition equipment provider based in Longmont, Colorado, where he lead several strategic initiatives such as global manufacturing, gross margin improvement, acquisition strategy, integration, and public market financing. Prior to joining Applied Films, Mr. Firestone served as vice president and chief operating officer of Avalanche Industries, an electronics manufacturing services company located in Colorado Springs, Colorado. Earlier, he held finance and operations positions at Woolson Spice and Coffee Company, TechniStar Corporation and Colorado Manufacturing Technology, Inc. in addition to consulting work for several early-stage technology companies. Mr. Firestone currently serves on the board of directors, and is the chairman of the audit committee of Amtech Systems, Inc., a publicly held semiconductor equipment company.

Thomas Rohrs was appointed as a Director of the Company in December 2004. He became Chairman of the Board and CEO in April 2006 and in February 2009 he became Executive Chairman of the Board. Mr. Rohrs presently serves on the board of Magna Design Automation, Inc., Ultraclean Technologies, and several private companies. In addition, he is an adviser and consultant to a number of companies both public and private. Mr. Rohrs spent five years with Applied Materials Inc., most recently as Senior Vice President, Global Operations, and was also a member of the company’s Executive Committee. Prior to that, he held executive positions with Silicon Graphics, MIPS Computer Systems and Hewlett-Packard Company’s Personal Computer Group. Mr. Rohrs holds a masters degree from Harvard Business School and a bachelors degree in Mechanical Engineering from Notre Dame Unitversity.