William P. McHale, Jr. Elected Chairman of DSET Board

Bridgewater, NJ - June 7, 2000 - (NASDAQ: DSET) - DSET Corporation, a leading supplier of business-to-business e-commerce connectivity solutions for the telecom industry, announced today that William P. McHale, Jr., DSET's president and chief executive officer, has been elected chairman of the DSET Board of Directors. McHale, who will continue as president and CEO, was elected to his new position at the Board meeting held in conjunction with DSET's annual meeting on May 24.

McHale replaces S. Daniel Shia, the founder of DSET Corporation, who did not stand for reelection to the Board of Directors. Shia's many years of involvement with leading-edge telecommunications technology led him to found DSET in 1989, where he has served as president, chief executive officer, and chief technology officer in addition to chairman of the Board. His innovative concept for an object-oriented, distributed communications framework became the first offering in DSET's successful line of products now used in the telecom industry worldwide.

McHale is a graduate of Villanova University, where he received his Bachelor of Science degree in business administration in 1971. He subsequently spent four years in the U.S. Navy, achieving the rank of lieutenant and is a Vietnam veteran.

McHale joined IBM in 1975 and is now a 25-year veteran of the computer industry. After four years at IBM, where he was a salesman and corporate marketing specialist, McHale joined Wang Laboratories, where he had responsibility for a significant portion of the North American sales force and eventually worldwide marketing. He joined Digital Equipment Corporation in early 1987, holding senior staff positions before managing a sales organization that had over one billion dollars of revenue responsibility.

From 1990 through 1996, McHale was the president and CEO of three different software and services companies that focused on developing and marketing application development tools to Fortune 500 companies.

McHale joined DSET in January 1997. Since then, the company has successfully completed an initial public offering of its stock and has grown from $13 million in revenue in 1996 to more than $44 million for 1999.

Commenting on his predecessor's departure from the DSET Board, McHale said, "Dan Shia accomplished what many other entrepreneurs only dream about. He founded a company based on his belief that he could create software which would solve very complex problems for the telecommunications industry. And he did it by raising money only from angel investors. Dan's focus on technology and the drive to run a profitable company put DSET on track for its twenty-eighth consecutive profitable quarter. We congratulate Dan and pass along a heartfelt 'thank you' as he resigns from the Board of Directors."

About DSET:

DSET Corporation is a leading provider of business-to-business e-commerce connectivity solutions for the global telecommunications marketplace. The DSET suite of electronic-bonding gateways is designed to interconnect the operations support systems (OSSs) of service providers that must exchange information and share network capabilities with trading partners to provision and maintain a growing range of services for customers in the competitive telecom market. DSET's local number portability solutions play a key role in enabling business and residential customers to change service providers without changing their local phone numbers. DSET is headquartered in Bridgewater, New Jersey, and the company's Web site can be viewed at www.dset.com.

Statements regarding financial matters contained in this press release, other than historical facts, are forward-looking. Since all statements about DSET's plans, estimates, and expectations are based on current projections that involve risks and uncertainties, and are subject to change at any time, the company's actual results may differ materially from expected results. Investors should consider these risks and uncertainties, which are discussed in documents filed by DSET with the Securities and Exchange Commission. These documents identify important factors that could cause the actual results to differ materially from those contained in the projections or forward-looking statements. DSET expressly disclaims any obligation to update any forward-looking statements.

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DSET Contacts:

Media Relations: Dean Maskevich, Marketing Communications, 908-526-7500 Ext. 1366, e-mail: dmaskevi@dset.com

Investor Relations: John P. Murphy, Westfield Investor Relations, 908-233-1558, e-mail: westfieldir@worldnet.att.net

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