For more information, contact:

Marna Shillman Advanced Energy Industries, Inc. 970.407.6280 marna.shillman@aei.com

Cathy Kawakami Advanced Energy Industries, Inc. 970.407.6732 cathy.kawakami@aei.com

FORT COLLINS, Colo., December 7, 2005—Advanced Energy Industries, Inc. (Nasdaq: AEIS) today announced the appointment of Kunihiko “Kenny” Kitagawa as President and Representative Director of Advanced Energy Japan K.K. (AEJ) based in Hachioji, Japan. He replaces Nobuo Kawakami, who will be assuming the position of Chairman.

Mr. Kitagawa’s career spans twenty years of semiconductor industry experience as both a general manager and as a technologist. Mr. Kitagawa was most recently a representative director for Ultratech KK. Prior to his position at Ultratech, he was a general manager of key divisions at KLA-Tencor Japan. Earlier, he served as a general manager of Applied Materials Japan, responsible for strategic customer accounts.

Hans Betz, president and chief executive officer of Advanced Energy, said, “AE Japan is a major component of our global infrastructure for sales, service and mass flow control product development. Kenny’s industry knowledge, as well as his insight into the OEM and end user customer experience, will help maximize our market positioning as we pursue key growth opportunities in semiconductor and flat panel display markets. He has a particularly strong track record of results in sales, marketing, service and new technology innovation, and is a valuable addition to our global management team.”

About Advanced Energy
Advanced Energy is a global leader in the development and support of technologies critical to high-technology, high-growth manufacturing processes used in the production of semiconductors, flat panel displays, data storage products, solar cells, architectural glass, and other advanced product applications.

Leveraging a diverse product portfolio and technology leadership, Advanced Energy creates solutions that maximize process impact, improve productivity and lower the cost of ownership for its customers. This portfolio includes a comprehensive line of technology solutions in power, flow, thermal management, and plasma and ion beam sources for original equipment manufacturers (OEMs) and end-users around the world.

Advanced Energy operates in regional centers in North America, Asia and Europe and offers global sales and support through direct offices, representatives and distributors. Founded in 1981, Advanced Energy is a publicly held company traded on the Nasdaq National Market under the symbol AEIS. For more information, please visit our corporate website: www.advanced-energy.com.