Aspen Technology, Inc. (OTC: AZPN.PK), a leading provider of software and services to the process industries, announced that Brad Miller will be leaving his post as chief financial officer in order to pursue other interests. The Company also announced that it has begun an executive search process to replace Mr. Miller, and that Mark Fusco will serve as interim chief financial officer pending completion of the search.

Mark Fusco, chief executive officer of AspenTech, stated “The Company and the Board would like to thank Brad for his service over the past two years, and for his efforts in getting the Company on file with its new independent auditing firm. With this important milestone achieved, we have a framework in place to help the Company complete its outstanding filing requirements. We wish Brad the best of luck in his future endeavors.”

Fusco added, “I believe the Company’s customer facing operations are executing at a high level, as evidenced by the solid license bookings performance in the most recent quarter and first six months of fiscal 2009. I am confident in the company’s ability to continue executing at a high level, and believe that today’s announcement will not impact our targets for bringing the company’s financial reporting current.”

About AspenTech

AspenTech is a leading global supplier of software that optimizes process manufacturing – including oil and gas, petroleum, chemicals, pharmaceuticals and other industries that manufacture and produce products from a chemical process. With integrated aspenONE solutions, process manufacturers can implement best practices for optimizing their engineering, manufacturing and supply chain operations. As a result, AspenTech customers are better able to increase capacity, improve margins, reduce costs and become more energy efficient. To see how the world’s leading process manufacturers rely on AspenTech to achieve their operational excellence goals, visit www.aspentech.com .