AOC Aon Corp.

CHICAGO, June 26 /PRNewswire-FirstCall/ -- Aon Consulting, the human capital consulting organization of Aon Corporation (NYSE:AOC), announced today the appointment of Chris Michalak as head of Business Development and Growth for Aon Consulting U.S. Michalak comes to Aon Consulting from Buck Consultants where he was chief executive officer, responsible for leading the global organization following its recent merger with ACS. Before assuming his most recent position, Michalak held positions at Buck which included leading Global Markets, the Central Region and the Chicago office. Prior to working at Buck, he was global director of Sales, Strategy and Operations at Towers Perrin. In his new role, Michalak will be responsible for business development and creating strategies to drive Aon's growth across all U.S. regions and practices. "In nearly 20 years in the industry, Chris has demonstrated leadership, innovation and dedication to his clients and colleagues. I am confident he will impact Aon Consulting's opportunities for growth and development and as a result, the services and value we offer clients," said Kathryn Hayley, chief executive officer of Aon Consulting U.S. "Chris brings to Aon Consulting global leadership and a history of significantly increasing sales through innovative initiatives and bringing distinctive value to clients. He will play an instrumental part in bringing our services to the next level, as we continue to focus on helping clients shape the workforce of the future through innovative strategies and solutions," said Andrew Appel, chief executive officer of Aon Consulting Worldwide. Michalak received a bachelor's degree in marketing from Michigan State University, and a master's degree in marketing and organizational behavior from the Kellogg Graduate School of Management at Northwestern University. For more information, contact: Sara Carlson 312.381.5045 About Aon Aon Corporation (http://www.aon.com/) is a leading provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting. There are 43,000 employees working in Aon's 500 offices in more than 120 countries. Backed by broad resources, industry knowledge and technical expertise, Aon professionals help a wide range of clients develop effective risk management and workforce productivity solutions. Aon Consulting Worldwide (http://www.aon.com/hcc) is among the top global human capital consulting firms, with 2006 revenues of $1.282 billion and 6,500 professionals in 117 offices worldwide. Aon Consulting is reshaping the workplace of the future through benefits, talent management and rewards strategies and solutions. In August 2006, Aon Consulting was named the best employee benefit consulting firm by the readers of Business Insurance magazine. This press release contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future 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 either historical or anticipated results depending on a variety of factors. Potential factors that could impact results include: general economic conditions in different countries in which we do business around the world, changes in global equity and fixed income markets that could affect the return on invested assets, fluctuations in exchange and interest rates that could influence revenue and expense, rating agency actions that could affect our ability to borrow funds, funding of our various pension plans, changes in the competitive environment, our ability to implement restructuring initiatives and other initiatives intended to yield cost savings, our ability to execute the stock repurchase program, our ability to obtain regulatory or legislative changes to permit continuous sales of our supplemental Medicare health product, changes in commercial property and casualty markets and commercial premium rates that could impact revenues, changes in revenues and earnings due to the elimination of contingent commissions, other uncertainties surrounding a new compensation model, the impact of investigations brought by state attorneys general, state insurance regulators, federal prosecutors, and federal regulators, the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions, ERISA class actions, the impact of the analysis of practices relating to stock options, the cost of resolution of other contingent liabilities and loss contingencies, and the difference in ultimate paid claims in our underwriting companies from actuarial estimates. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, is contained in the Company's filings with the Securities and Exchange Commission. http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO http://photoarchive.ap.org/ DATASOURCE: Aon Corporation CONTACT: Sara Carlson of Aon Corporation, +1-312-381-5045, Web site: http://www.aon.com/

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