Siebel Systems, Inc.

Siebel Systems, Inc.

March 16, 2005 18:36 ET

Siebel Systems to Participate at the SDForum Software as a Service Conference


NEWS RELEASE TRANSMITTED BY CCNMatthews

FOR: SIEBEL SYSTEMS, INC.

NASDAQ SYMBOL: SEBL

MARCH 16, 2005 - 18:36 ET

Siebel Systems to Participate at the SDForum Software
as a Service Conference

SAN MATEO, Calif.--(CCNMatthews - Mar 16, 2005) -

Siebel Systems, Inc. (NASDAQ:SEBL), a leading provider of business
applications software, today announced that Ken Rudin, Vice President,
Siebel CRM OnDemand, will be participating in a panel at the SDForum
Software as a Service Conference at 11:00 a.m. Pacific Time/2:00 p.m.
Eastern Time, on March 22, 2005, in Santa Clara, California.

A live audio broadcast of the panel can be accessed by calling
1-888-889-1956 from inside the U.S. or 1-517-308-9007 from outside the
U.S. The audio passcode is SIEBEL.

An archive audio broadcast of the panel will be available by calling
1-866-507-3570 from inside the U.S. or 1-203-369-1884 from outside the
U.S. The audio passcode for the replay is also SIEBEL.

Live and archived Webcasts of the discussions will be available at
www.siebel.com/keynotes.

About Siebel Systems

Siebel Systems, Inc. is a leading provider of business applications
software, enabling corporations to sell to, market to, and serve
customers across multiple channels and lines of business. With more than
4,000 customer deployments worldwide, Siebel Systems provides
organizations with a proven set of industry-specific best practices, CRM
applications, market-leading analytics products, and business processes,
empowering them to consistently deliver superior customer experiences
and establish more profitable customer relationships. Siebel Systems'
sales and service facilities are located in more than 30 countries.

For more information on Siebel Systems solutions and services, please
visit our Web site: CRM -- http://www.siebel.com/crm; OnDemand Solutions
-- http://www.crmondemand.com; Industry CRM --
http://www.siebel.com/industry-crm; Call Center and Service --
http://www.siebel.com/call-center; Sales Force Automation --
http://www.siebel.com/sales-force-automation; Marketing Automation --
http://www.siebel.com/marketing-automation; Business Intelligence --
http://www.siebel.com/business-intelligence; Integration Solutions --
http://www.siebel.com/integration-solutions; CRM Services --
http://www.siebel.com/crm-services.

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 customers, 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, Quarterly Reports on Form 10-Q and
its other filings with the Securities and Exchange Commission, which are
available at www.sec.gov. Siebel Systems assumes no obligation to update
the information in this press release.

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.

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