Micromuse to Address Mission and Service Assurance Best Practices for Aligning IT Infrastructure for U.S. Navy

Micromuse Inc. (Nasdaq: MUSE), the leading
provider of ultra-scalable, realtime business and service assurance
software, will participate in an industry expert discussion entitled
"Service Oriented Architectures: Key to Portfolio Management," at 4:35
PM CDT on Wednesday, August 10, 2005 at the Department of the Navy
Enterprise IT Industry Symposium in New Orleans, Louisiana. Chris
Carlson, Micromuse's Director of Technical Services and Robert Rhodes,
Micromuse's Federal Solutions Architect, will be joined by key
government IT personnel to outline the complex IT challenges the U.S.
Navy faces and best practices that enable the Navy to align its
operational mission and IT infrastructure through end-to-end service
solutions.
   Mr. Carlson will discuss "Delivering Mission and Service Assurance
for the Department of the Navy," and Mr. Rhodes will address
"Delivering an Enterprise IT Portfolio through Consolidated Operations
Management: A Best Practices Approach."
   The Department of the Navy Enterprise IT Industry Symposium 2005
aims to extend the dialogue between the Department of the Navy (DoN)
and the IT industry that is taking place as the DoN makes the
transformation from a locally purchased and operated IT inventory to
an enterprise IT portfolio that is acquired and managed centrally. For
more information go to http://www.navyitsymposium.com/

   About Micromuse's Solutions for Government End Users

   Micromuse Inc. (Nasdaq: MUSE) is the leading provider of
ultra-scalable, realtime business and service assurance software
solutions. The Netcool(R) software suite provides government
organizations with the assurance that their missions are supported by
their IT systems 24 hours a day. Unlike traditional infrastructure
management systems, Netcool solutions provide realtime end-to-end
visibility and accurate troubleshooting from a mission-critical
perspective. Mission-critical intelligence about IT systems allows
organizations to respond to problems quickly, streamline workflow
processes and improve user uptime. Micromuse defense and intelligence
agency customers include the U.S. Department of State, the U.S. Air
Force, U.S. Army, the Pentagon, NASA, the U.S. Navy, the Department of
Energy, USDA, the Department of Justice and the Army National Guard.
Micromuse's headquarters are located at 139 Townsend Street, San
Francisco, California, 94107; [phone]. Micromuse's federal
sales offices are located in McLean, Virginia. For more information go
to http://www.micromuse.com/sols/gov.html

   Micromuse and Netcool are registered trademarks of Micromuse Ltd.
All other trademarks and registered trademarks in this document are
the properties of their respective owners. Any statements contained in
this press release that do not describe historical facts may
constitute forward-looking statements as that term is defined in the
Private Securities Litigation Reform Act of 1995. Any forward-looking
statements contained herein are based on current expectations, but are
subject to a number of risks and uncertainties.

   The factors that could cause actual future results to differ
materially from the forward-looking statements include the following:
fluctuations in customer demand, the Company's ability to manage its
growth (including the ability to hire sufficient sales and technical
personnel), the risks associated with the expansion of the Company's
distribution channels, the risk of new product introductions and
customer acceptance of new products; the rapid technological change
which characterizes the Company's markets, the risks associated with
competition, the risks associated with international sales as the
Company expands its markets, and the ability of the Company to compete
successfully in the future, as well as other risks identified in the
Company's Securities and Exchange Commission Filings, including but
not limited to those appearing under the caption "Risk Factors" in the
Company's most recent Quarterly Reports on Form 10-Q and on Form 10-K
on file with the Securities and Exchange Commission and available on
the Company's Web site.