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

Fort Collins, Colorado (August 27, 1999) – Advanced Energy Industries, Inc. (Nasdaq NM:AEIS) has appointed Fred DeSantis to the position of Senior Vice President, Assistant to the President & Chief Operating Officer. In announcing this new appointment, AE’s COO Hollis Caswell said, “We are happy to have Fred joining us at AE. His broad engineering background will be of great value to the company as we face the challenges of the coming century. We anticipate he will be a key player in determining the future direction of the Company.”

In this new position, Mr. DeSantis will be responsible for establishing engineering operations at Advanced Energy’s Western Regional Facility as well as formulating power delivery architecture for future AE products. Mr. DeSantis comes to AE with a BS in Physics and an extensive background in computer system design, hardware architecture and ASIC development both as a developer and a manager. Mr. DeSantis has held a number of senior executive positions with Burroughs, Unisys and Siemans where he managed systems development, common platforms, technology, software, marketing, and customer support.

Advanced Energy is a worldwide leader in the development and marketing of process power conversion and control system solutions. Serving a diverse array of global markets, Advanced Energy’s products are used in the manufacture of semiconductors, CD-ROMs, DVDs, compact disks, flat panel displays, disk drives, optical and architectural glass, and a number of other markets where thin-film deposition is critical in the manufacturing process. In addition, Advanced Energy is the process power solution of choice to a growing number of industrial 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.