Aon Announces Launch of Aon Management Consulting, Assisting Clients with Process Improvement, Leadership and Organizational Effectiveness.

Business Editors

CHICAGO--(BUSINESS WIRE)--Dec. 11, 2001

Aon Management Consulting to Operate as Part of

Aon Consulting Worldwide

Aon Corporation (NYSE: AOC) announced today the launch of Aon Management Consulting, an organization that has been established to help companies achieve dramatic improvements in productivity, efficiency, bottom-line growth and organizational leadership. Aon Management Consulting is part of Aon Consulting Worldwide.

"Discussions about productivity improvement, organizational strategy, leadership and bottom-line impact are boardroom issues where Aon has unique expertise," stated Donald C. Ingram, Chairman and CEO, Aon Consulting Worldwide. "Through our Management Consulting organization, we are well positioned to assist clients in these areas."

Aon Management Consulting will deliver the Rath & Strong Six Sigma suite of quality management services. Rath & Strong, acquired by Aon in 1997, was founded in 1935 and is the leading management consulting firm in the world providing global deployment of Six Sigma solutions. Aon's Rath & Strong work in the Six Sigma field features client relationships with leading global companies such as Johnson & Johnson, Siemens, TRW and Owens Corning Alcopor. Recently, Aon Management Consulting's Six Sigma Pocket Guide, created and published by Rath & Strong Six Sigma consultants, was listed as one of the top 15 best-selling business books in America (source: Wall Street Journal, June 22, 2001).

Daniel L. Quinn, who formerly headed up Aon Consulting Rath & Strong, will serve as president and CEO of Aon Management Consulting. His prior positions include managing worldwide director for the Juran Institute and management positions with Bain and Company and Boston Consulting Group. Mark Lifter, senior vice president of the former Aon Consulting Human Resources Consulting Group, will serve as executive vice president.

Quinn commented, "As we continue to work with established clients and develop relationships with new clients, we are committed to bringing the strengths of all of the Aon organization to companies to help them with key management issues that they face. Drawing on our years of consulting expertise - and the fact that we, as an organization, are now stronger together - I am certain that our client-focused offerings will be of benefit to a variety of organizations."

Aon Management Consulting includes world-class service offerings in areas such as employee assessment and selection and leadership and organization effectiveness that were formerly offered as part of Aon's Human Resources Consulting organization. The organization will continue to work with companies to implement human resources and organizational consulting services aimed at helping companies attract and develop current talent and find the skill sets necessary to maximize productivity and identify future leaders.

Aon Corporation (www.aon.com) is a holding company that is comprised of a family of insurance brokerage, consulting and insurance underwriting subsidiaries. Aon's common stock is listed on the New York, Chicago, Frankfurt and London stock exchanges.

Aon Consulting Worldwide is among the world's top global human resource consulting firms, with 2000 revenues of $770 million and 6,600 employees in over 120 offices worldwide. Aon Consulting delivers integrated solutions to help clients with employee benefits, compensation, human resources and management consulting.

This press release may contain certain statements relating to future results, which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from historical results or those anticipated, depending on a variety of factors such as general economic conditions in different countries around the world, fluctuations in global equity and fixed income markets, changes in commercial property and casualty premium rates, the competitive environment, the actual cost of resolution of contingent liabilities, the final form of the business transformation plan, the ultimate cost and timing of the implementation thereof, the actual cost savings and other benefits resulting therefrom, whether the Company ultimately implements the proposed spin-off of its underwriting operations, and the timing and terms associated therewith, the timing, amount and ultimate completion of the capitalization of Endurance Specialty Insurance Ltd. and events surrounding terrorists attacks of September 11, 2001, including the timing and resolution of related insurance and reinsurance issues. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, are contained in the Company's filings with the Securities and Exchange Commission.