For more information, contact:

Jim Donaldson Advanced Energy Industries, Inc. 970.407.6374

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

Milpitas, California (August 20, 1999) – Advanced Energy Industries, Inc. (Nasdaq NM: AEIS) has named Bob Garcia Account Manager for Lam Research. AE’s Western Regional Manager, Allen Vallei said, “Bob brings a wealth of industry experience and a strong sense of commitment, customer focus, and teamwork to this key position. I am very pleased to have Bob on board.”

Mr. Garcia will be responsible for the day-to-day account management activities associated with AE’s continued business relationship with Lam Research. Mr. Garcia has more than 20 years of experience in the semiconductor equipment industry, having served in a number of key positions with both systems and component manufacturers.

Prior to coming to Advanced Energy, Mr. Garcia was the District Sales Manager for Spectra International, a manufacturer of residual gas analyzers and optical spectrometers. Prior to that Mr. Garcia spent more than seven years with MKS Instruments as a Regional Applications Manager as well as District Sales Manager. He also spent a number of years with the Temescal division of Edwards High Vacuum International as Technical Support Manager.

Advanced Energy is a worldwide leader in the development and marketing of process power conversion and control system solutions. Customers throughout the world use Advanced Energy’s products where thin film deposition and etch are critical steps in their manufacturing processes. These include the manufacture of semiconductors, CD-ROMs, DVDs, compact disks, flat panel displays, disk drives, optical and architectural glass. In addition, Advanced Energy provides the process power solutions of choice to a growing number of industrial and commercial applications in the automotive, food packaging and tool industries. Founded in 1981, AE is a publicly-held company traded on Nasdaq under the symbol AEIS.