Ruhrgas' Energy Service Center Standardizes on Siebel eBusiness Applications.

Business Editors/High-Tech Writers

SAN MATEO, Calif.--(BUSINESS WIRE)--Jan. 28, 2002

Leading German Gas Supply Company Uses Industry-tailored

Functionality of Siebel eEnergy To Enhance Quality of

Service, Boost Customer Loyalty And Increase Revenues.

Siebel Systems, Inc., (Nasdaq:SEBL), the world's leading provider of eBusiness applications software, today announced that Ruhrgas' Energy Service Center, which provides customer contact center solutions on behalf of Ruhrgas, Germany's leading gas supply company, has standardized on Siebel eBusiness Applications. The company is using the powerful functionality of Siebel eEnergy -- a version of Siebel eBusiness Applications tailored to the unique challenges of the energy industry -- to introduce a single, comprehensive view of the customer. By uniting customer information, Ruhrgas' Energy Service Center is increasing customer satisfaction, extending brand loyalty and maximizing revenues.

To succeed in the liberalized, highly competitive utilities market, Ruhrgas has introduced additional value-added services aimed at increasing customer satisfaction and extending brand loyalty. Most notable among these new services is Ruhrgas' pioneering Energy Service Center. This center provides comprehensive outsourcing of customer service support on behalf of Ruhrgas' regional distribution authority customers. Siebel eEnergy is the cornerstone of this Energy Service Center. Ruhrgas is using the software to ensure each and every customer receives a consistent, accurate and timely response to their enquiry. Using this approach, the company is maximizing customer satisfaction and increasing revenues.

When a customer contacts their local gas authority, using whichever channel is most convenient to them -- including email, face-to-face, telephone, post or fax -- their enquiry is automatically routed to, managed and resolved centrally by Ruhrgas' Energy Service Center. Using Siebel eEnergy, the center's 100 agents have real time access to the information they need to address gas billing enquiries, scheduling of new services and metering issues, and responses to malfunctions in gas supply. They also have a unified platform for recording, diagnosing, assigning, monitoring and managing customer `trouble tickets' from the initial call through to resolution -- through any channel.

Using the software, the center is profiling customers, creating and managing accounts, tracking individual sales opportunities, generating quotes and service orders, and managing contracts. By using Siebel eEnergy, the center can offer regional gas supply authorities the opportunity to run targeted marketing campaigns, aimed at increasing both gas usage and the number of customers switching to gas from other energy supplies. Campaigns range from segmenting customer address lists, to qualifying them for the final direct mail campaign.

"As the utilities industry evolves from a monopoly in a regulated utilities market, to a competition-based energy and service industry, the rich functionality, straightforward integration and powerful service capabilities of Siebel eEnergy will allow Ruhrgas to deliver additional added-value services to its gas distribution partners," says Frank Oesterwind, CEO, Ruhrgas Energy Service Center. "They, in turn, will be able to maximize customer satisfaction, loyalty and revenues -- and prosper in this deregulated, highly competitive market."

Ruhrgas AG is Germany's leading gas supply company, providing regional energy distribution companies, industry and power stations in Germany and neighbouring countries with secure, economic gas solutions. During 2000, the privately owned company achieved revenues of $9 billion, and had 2,600 staff.

About Siebel Systems

Siebel Systems, Inc. (Nasdaq:SEBL) is the world's leading provider of eBusiness applications software. Siebel Systems provides an integrated family of eBusiness applications software, enabling multichannel sales, marketing, and customer service systems to be deployed over the Web, call centers, field, reseller channels, retail, and dealer networks. Siebel Systems' sales and service facilities are located in more than 37 countries. For more information, please visit Siebel Systems' Web site at www.siebel.com.

Except for the historical information contained herein, this press release contains forward-looking statements that involve risk or uncertainties. Future operating results of Siebel Systems may differ from the results discussed or forecasted in the forward-looking statements due to factors that include, but are not limited to, risks associated with customer relations, such as the availability of Siebel Systems' products and services, customer implementation of products and services, relationships with third-party vendors and systems integrators, concentration of revenues in a relatively small number of customers, existence of errors or defects in products, ability to successfully manage growth, significant current and expected additional competition and the need to continue to expand product distribution and services offerings. Further information on potential factors that could affect the financial results of Siebel Systems are included in Siebel Systems' Annual Report on Form 10-K for the year ended December 31, 1999 and its other filings with the Securities and Exchange Commission.

Note to Editors: Siebel is a trademark of Siebel Systems, Inc. and may be registered in certain jurisdictions. All other product and company names mentioned are the property of their respective owners and are mentioned for identification purposes only.