OFFICERS & BOARD

## Executive Officers

Hans Betz

Chief Executive Officer
Dr. Hans-Georg Betz joined Advanced Energy’s board of directors in July 2004 and was appointed to president and chief executive officer in August 2005. Dr. Betz has over 30 years of experience in the electronics industry. Previously, he was chief executive officer of West STEAG Partners GmbH and STEAG Electronic System AG, as well as a managing director at Leybold AG. Dr. Betz currently serves as a board member for Mattson Technology.

Yuval Wasserman

President and Chief Operating Officer
Yuval Wasserman joined Advanced Energy in August 2007, bringing 24 years of executive, management, and technical experience in the semiconductor industry. Immediately prior to joining AE, Mr. Wasserman served as the president and CEO of Tevet Process Control Technologies, Inc., where he led the development and growth of the company. Prior to that, he held senior executive and general management positions at Boxer Cross (metrology company: acquired by Applied Materials, Inc.), Fusion Systems (plasma strip: a division of Axcelis Technologies, Inc.), and AG Associates (RTP). Mr. Wasserman started his career at National Semiconductor, where he held various process engineering and management positions.
Mr. Wasserman earned a bachelor of science degree in chemical engineering from Ben Gurion University in Israel and studied business at the AEA/Stanford University Executive Institute.

Gregg Patterson

Executive Vice President and General Manager of Advanced Energy Renewables
Mr. Patterson is executive vice president and general manager of Advanced Energy’s Renewables business unit that focuses on solar energy management solutions for the utility, commercial, and string markets. Prior to his current role, Mr. Patterson joined PV Powered in 2006 and developed the executive team that grew the organization from 18 employees and $5M annual revenues to 90 staff and $21M in 2009. Prior to joining PV Powered, Mr. Patterson was a vice president of Hewlett Packard in the high-growth Printing and Imaging Group. His responsibilities at HP included general management of $1B+ businesses, spanning both enterprise and consumer segments, and direct involvement in mergers and acquisitions, successfully leading the acquisition and integration of several key companies bought by HP.
Mr. Patterson graduated from the University of Washington with a BSME and was awarded an HP fellowship, and he attended Stanford University where he earned his master's in engineering.

Danny Herron

Executive Vice President and Chief Financial Officer
Danny C. Herron joined Advanced Energy in September 2010 with more than 25 years’ tenure in finance and operations in the renewable energy and consumer product sectors. Prior to serving at Advanced Energy, Mr. Herron held the position of chief financial officer for Sundrop Fuels, Inc., a solar gasification-based renewable fuels company based in Louisville, Colorado. He also previously served as president and chief financial officer of VeraSun, a publicly-traded corn-based ethanol company; chief financial officer of the $10 billion beef and pork producer Swift & Company; and chief financial officer of an $8.5 billion international division at ConAgra Foods, Inc.
Mr. Herron holds a bachelor of business administration degree in accounting from Valdosta State University and a master’s in business administration from Southern New Hampshire University.

## Board of Directors

NAME | AGE | DIRECTOR SINCE
Douglas S. Schatz | 65 | 1981

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Douglas S. Schatz is a co-founder of Advanced Energy and has been its Chairman since its incorporation in 1981. From 1981 through July 2005, Mr. Schatz also served as our Chief Executive Officer. From 1981 through July 1999 and from March 2001 through July 2005, he also served as our President. Mr. Schatz is chairman of the board of Abound Solar (fka AVA Solar), a thin-film solar panel manufacturer, and served as interim CEO of Abound from June 2009 to January 2010. Mr. Schatz is currently on the boards of several additional private companies and organizations, both for-profit and non-profit.

Frederick A. Ball (1) | 48 | 2008

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Frederick A. Ball is the Chief Financial Officer of Webroot Software, a leading provider of software security solutions, a position he has held since June 2008. From August 2004 to November 2007, Mr. Ball was the Senior Vice President and Chief Financial Officer of BigBand Networks, a provider of digital video networking platforms. From September 2003 until May 2004, Mr. Ball served as Chief Operating Officer of CallTrex Corporation, a provider of customer service solutions. Prior to his employment with CallTrex, he was employed with Borland Software Corporation, a provider of enterprise software development solutions, from September 1999 until July 2003. Prior to his employment with Borland, Mr. Ball served as Vice President, Mergers and Acquisitions for KLA-Tencor, a supplier of process control and yield management solutions for the semiconductor and related microelectronics industries, and prior to that as its Vice President of Finance. Mr. Ball was an accountant with PriceWaterhouseCoopers for over 10 years. Mr. Ball has been a director of Electro Scientific Industries, Inc. since 2003 and is a member of its audit committee.

Richard P. Beck (1,2) | 77 | 1995

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Richard P. Beck joined Advanced Energy in March 1992 as Vice President and Chief Financial Officer and became Senior Vice President in February 1998. In October 2001, Mr. Beck retired from the position of Chief Financial Officer, but remained as a Senior Vice President of the Company until May 2002. Mr. Beck was chairman of the board of Applied Films Corporation, a publicly held manufacturer of flat panel display equipment, until August 2006 when it was acquired by Applied Materials, and he had served on Applied Films’ audit and nominating and governance committees. He has been a director of TTM Technologies, Inc., a publicly held manufacturer of printed circuit boards, since 2001. He serves as a member of TTM Technologies’ nominating and governance committee and is chairman of its audit committee. Mr. Beck is a director of SemiLEDS, Inc., a publicly held manufacturer of LED chips, and is the chairman of its audit committee and chairman of its nominating and governance committee. Mr. Beck was a director of Photon Dynamics, Inc., a publicly held manufacturer of semiconductor test equipment, from September 2000 to October 2004 and was chairman of its audit committee.

Hans Georg Betz | 64 | 2004

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Hans Georg Betz has served as our Chief Executive Officer since August 2005. From August 2005 through December 2009, he also served as our President. From August 2001 until August 2005, Dr. Betz served as chief executive officer of West Steag Partners GmbH, a German-based venture capital company focused on the high-technology industry. In his over 30-year career in the electronics industry, Dr. Betz also served as chief executive officer of STEAG Electronic Systems AG and a managing director at Leybold AG. Dr. Betz has served as a director of Mattson Technology, Inc., a publicly held supplier of advanced process equipment used to manufacture semiconductors since 2001, and serves as chairman of its compensation committee.

Trung T. Doan (1,3) | 52 | 2005

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Trung T. Doan re-joined the Board of Directors of Advanced Energy in November 2005. He had previously served on the Board from July 2000 to January 2004. Mr. Doan is the chairman and chief executive officer of SemiLEDs Corporation, a manufacturer of high-brightness light emitting diodes. Prior to founding SemiLEDs in 2005, Mr. Doan was the corporate vice president of the Applied Global Services product group at Applied Materials, a semiconductor equipment company. Prior to Applied Materials, Mr. Doan held various management and executive positions at a number of technology companies, including Intel Corp., Honeywell International, Micron Technology, Inc. where he had worked from 1988 to 2003 and last held the position of Vice President of Process Development, and Jusung Engineering, Inc., a semiconductor and LCD equipment company based in Korea.

Edward C. Grady (2,3) | 63 | 2008

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Edward C. Grady has been consulting on a part-time basis as Chairman & CEO of REEL Solar, Inc., an early stage privately funded company, since May 2010. Mr. Grady retired in October 2007, from his position as President and Chief Executive Officer of Brooks Automation, a provider of automation solutions to the global semiconductor and other complex manufacturing industries, including clean tech and data storage. Prior to joining Brooks Automation in February 2003, he ran multiple divisions at KLA-Tencor and had served as Chief Executive Officer of Hoya Micro Mask Inc., a supplier of photo masks and services to the semiconductor industry. Mr. Grady began his career as an engineer for Monsanto/MEMC and, during his 14 years with the company, rose to the position of Vice President of Worldwide Sales for EPI, a division of MEMC. Mr. Grady currently serves on the boards of directors of the following publicly held companies: Evergreen Solar, Inc., a developer and manufacturer of solar panels and other solar energy products; Verigy Ltd., a provider of automated test systems for the semiconductor industry; and Electro Scientific Industries, Inc., a supplier of production equipment for micro-engineering applications. Mr. Grady also served on the board of directors of Brooks Automation from February 2003 to March 2008.

Terry Hudgens (2,3) | 56 | 2010

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Terry Hudgens has been a special advisor to Iberdrola Renewables, Inc., a leading provider of renewable energy, since November 2008. From April 2007 until his retirement in November 2008, Mr. Hudgens served as president and chief executive officer of Iberdrola Renewables’ U.S. and Canadian energy businesses. Mr. Hudgens joined Iberdrola in connection with Iberdrola’s acquisition of PPM Energy, the U.S. subsidiary of Scottish Power plc, an electricity distributor and wind power producer, where he had served as President and Chief Executive Officer since May 2001. Prior to joining PPM Energy, Mr. Hudgens served in various management and operations positions with a number of utilities and energy companies, including PacifiCorp and Texaco Inc.

Thomas M. Rohrs (1,3) | 60 | 2006

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Thomas M. Rohrs has been the Chief Executive Officer of Skyline Solar since June 2010. Mr. Rohrs had been an advisor and consultant to a number of companies, both public and private, including renewable energy companies from February 2009 to June 2010. From April 2006 to February 2009, Mr. Rohrs served as Chief Executive Officer and Chairman of the Board of Electroglas, Inc., a supplier of wafer probers and software solutions for the semiconductor industry. In July 2009, Electroglas filed a voluntary petition under Chapter 11 of the U.S. Bankruptcy Code, citing the dramatic decline in semiconductor manufacturing equipment resulting from the global economic recession. In August 2009, Mr. Rohrs began serving as Interim Chief Executive Officer of Electroglas, which subsequently has sold substantially all of its assets. From December 2004 to March 2011, Mr. Rohrs served as a director of Electroglas. From 1997 to 2002, Mr. Rohrs was with Applied Materials, Inc., a semiconductor equipment company, most recently as Senior Vice President of Global Operations, and served as a member of Applied’s executive committee. Mr. Rohrs serves on the board of directors of Magma Design Automation, Inc., an electronic design automation software and design services company, Vignani Technologies Pvt. LTd., a engineering services company and Intevac, Inc., a leading supplier of magnetic media processing systems and Seque Manufacturing Services, a private manufacturing services company. Mr. Rohrs served on the board of directors of Ultra Clean Holdings, Inc. from 2003 to 2008 and was a member of its compensation and nominating committees. Mr. Rohrs served as a director of Ion Systems, Inc., an electrostatic control company, from 2003 until January 2006 when Ion Systems was sold.

(1) Member of the Audit and Finance Committee.
(2) Member of the Nominating and Governance Committee.
(3) Member of the Compensation Committee.