Aon Risk Services, the retail brokerage and risk management arm of Aon Corporation (NYSE: AOC), announced today that John G. Willett, 43, has joined the company's Boston office as managing director. He is a member of the leadership team and responsible for new client acquisition for the New England region. In addition, he will focus on real estate related business in conjunction with the Aon national real estate practice.

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Willett joined Aon, the world's number one risk brokerage, after seven years at Lexington Insurance and American International Group, where he held several positions including director of marketing, national real estate practice leader for AIG, and president of the AI Risk Specialists Division. He previously held leadership positions in two large regional insurance brokerage operations in Massachusetts.

Willett received a master's of business administration from the F.W. Olin School at Babson College and his bachelor of arts degree from Hobart College.

About Aon

Aon Risk Services represents the retail brokerage and risk management arm of Aon Corporation. ARS designs, places, and implements customized insurance and risk mitigation solutions for clients. ARS works with all Aon's business units to bring the right set of expertise and solutions that meet each client's unique risk management needs.

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.

  Media Contact
  Rahsaan Johnson
  312.381.2684
  Rahsaan_Johnson@aon.com

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SOURCE: Aon Corporation

CONTACT: Rahsaan Johnson of Aon Corporation, +1-312-381-2684,
Rahsaan_Johnson@aon.com

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