CHICAGO, Oct. 23 /PRNewswire-FirstCall/ -- Aon Consulting, the global human capital consulting organization of Aon Corporation (NYSE: AOC), announced today that Mark Arian has joined the firm as executive vice president and leader of the Aon Consulting Corporate Transactions group, focusing on mergers and acquisitions.

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Arian and his team will be responsible for helping clients shape strategies in the areas of organization, benefits and talent, as employers work through restructuring, mergers, acquisitions and divestitures. Arian brings more than 20 years of experience in helping clients focus on human capital issues arising from transformations. He joins Aon from Towers Perrin where he was the global change management leader and practice leader for Mergers, Acquisitions and Restructuring. Prior to Towers Perrin, he built and led Hewitt Associates' Corporate Restructuring and Change business.

"Mark is a tremendous addition to Aon Consulting," said Kathryn Hayley, chief executive officer of Aon Consulting. "He has a wealth of experience in working with organizations worldwide in shaping their corporate, benefit and talent strategies when going through transformations. This is a critical time for the business world. With significant change happening daily, we're confident that Mark will serve as a strong leader and strategic partner in guiding clients through major periods of transition."

Arian earned a Bachelor of Arts degree from Duke University, and he is a graduate of the Columbia University Graduate School of Business Executive Education Program. He earned a Juris Doctorate from the Columbia University School of Law and is a member of the Bar of the State of New York and the District of Columbia.

Arian joined Aon Consulting on Oct. 23, and is based in New York City. He reports to Hayley.

About Aon Consulting

Aon Consulting Worldwide is among the top global human capital consulting firms, with 2007 revenues of $1.352 billion and 6,335 professionals in 117 offices worldwide. Aon Consulting is shaping the workplace of the future through benefits, talent management and rewards strategies and solutions. Aon Consulting was named the best employee benefit consulting firm by the readers of Business Insurance magazine in 2006, 2007 and 2008. For more information on Aon, please visit http://www.aon.mediaroom.com/.

About Aon

Aon Corporation (NYSE: AOC) is the leading global provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting. Through its 36,000 colleagues worldwide, Aon readily delivers distinctive client value via innovative and effective risk management and workforce productivity solutions. Our industry-leading global resources, technical expertise and industry knowledge are delivered locally through more than 500 offices in more than 120 countries. Aon was named the world's best broker by Euromoney magazine's 2008 Insurance Survey. In 2008, Aon ranked highest on the Business Insurance ranking of the world's largest insurance brokers based on commercial retail, wholesale, reinsurance and personal lines brokerage revenues. Aon also was ranked by A.M. Best as the number one insurance broker based on brokerage revenues in 2007 and 2008, and was voted best insurance intermediary, best reinsurance intermediary, and best employee benefits consulting firm in 2007 and 2008 by the readers of Business Insurance. Sign up to receive Aon news alerts by email or RSS feed at: http://aon.mediaroom.com/index.php?s=58.

   Media Contact:
   Joe Micucci
   312-381-4786
   joe_micucci@aon.com

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SOURCE: Aon Corporation

CONTACT: Joe Micucci of Aon Consulting, +1-312-381-4786,
joe_micucci@aon.com

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