Aon Corporation (NYSE: AOC) has appointed Andrew M. Appel, 40, as chief executive officer of Aon Consulting Worldwide, the company's human capital and management consulting operation. The appointment is effective immediately.

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Appel will report to Greg Case, Aon's president and CEO. Appel succeeds Donald C. Ingram, who has had longstanding plans to retire as Aon Consulting's chief executive officer. Ingram will remain as Aon Consulting's chairman.

Appel joins Aon from McKinsey & Company, where he was a senior partner in the firm's Financial Services and Technology practices. While at McKinsey, Appel served as a consultant to a wide variety of clients, mainly in financial services. Appel also was a founding leader of McKinsey's Business Technology Offices and a member of McKinsey's Global Technology and Operating and Practice Committees.

Case said, "Under Don Ingram's leadership, Aon Consulting has gained a strong position in strategic human capital consulting. It is one of our cornerstones. In many ways, Don has followed in the footsteps of our founder, Pat Ryan, as a true builder of Aon. His long service and leadership at Aon have been extraordinary, and we are delighted that he will serve in the chairman's role to help Andrew and the leadership team to create the next chapter in Aon's consulting business."

Case added, "In Andrew Appel, Aon and the Aon Consulting management team will find a proven leader and team builder with a track record for building successful consulting businesses. Andrew has a passion for serving his clients with energy and creativity in ways that mesh perfectly with Aon Consulting's client-first approach to the business. I am pleased to welcome him to the company."

Ingram said, "It has been rewarding to have been a part of Aon Consulting's move into the top ranks of human capital and management consulting firms. I attribute our success to the dedicated professionals and a management team that has built a solid foundation for future growth."

A Los Angeles native, Appel holds a bachelor's degree in economics from the University of California at Los Angeles, graduating magna cum laude. He earned his M.B.A. from the University of Chicago, where he was also a Henry Ford II scholar. Appel and his family reside in the Chicago area.

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 47,000 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.

  For more information, contact:
  Al Orendorff, Aon Corporation, +1.312.381.3153, al_orendorff@aon.com .

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, 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 regulatory investigations brought by state attorneys general and state insurance regulators related to our compensation arrangements with underwriters and related issues, the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions, and ERISA class actions, 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.

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SOURCE: Aon Corporation

CONTACT: Al Orendorff of Aon Corporation, +1-312-381-3153,
al_orendorff@aon.com

Web site: http://www.aon.com/