DSET Appoints Jeff Gill As Vice President of Professional Services

Bridgewater, NJ - July 24, 2000 - (Nasdaq: DSET) - DSET Corporation, a leading supplier of business-to-business e-commerce connectivity solutions for the telecom industry, announced today that Jeffrey S. Gill has assumed the position of vice president of professional services, reporting to the company's president and chief executive officer.

Mr. Gill was previously the vice president of a strategic business unit at Cap Gemini Ernst & Young that provided systems integration services to telecommunications providers and network equipment suppliers. Mr. Gill has also been a program manager and program director at Beechwood Data Systems and at Cap Gemini prior to their integration with Ernst & Young.

"Jeff's experience in profitably managing large teams of engineers and program managers for implementing complex software systems at a major CLEC is relevant and critical to our continued success," said Bill McHale, DSET's president and chief executive officer. "Our strategy is to build teams of DSET employees to provide training, installation and configuration, testing, and program management for 50% of our expanding customer base. Jeff will also be working closely with our systems integration partners to ensure that they train teams of their people to perform the same services, and more, for the other 50% of our customers."

Mr. Gill added, "I am thrilled to take on the challenge of building the Professional Services team at DSET and to ensure that our customers get the breadth of services required, either through DSET's teams, our systems integrator partners, or a combination of both."

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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