PITTSBURGH (September 15, 2011) – Aon Risk Solutions, the global risk management business of Aon Corporation (NYSE: AON), today announced the appointment of John Moskal as executive vice president and regional sales director of the Pittsburgh office.

Most recently, Moskal served as managing director of Marsh’s Columbus, Ohio office and was the East Partnership Sales Leader. He spent more than 31 years at Marsh, where he held various senior management positions in leadership, sales and marketing.

“We are very excited to add such a highly regarded veteran to strengthen our existing Pittsburgh team and look forward to the valuable insight John will bring to Aon’s clients,” said Dan D’Alessandro, Aon Risk Solutions’ Regional Managing Director.

Moskal earned a Bachelor of Science degree in business administration from Duquesne University. He serves on the leadership board of the American Diabetes Association and the Gateway Community Leadership Team and is a member of the North Boroughs Rotary Club.

Media Contacts:

Kelly Drinkwine                   Cybil Rose            

312.381.2684                      312.755.3537

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About Aon

Aon Corporation (NYSE:AON) is the leading global provider of risk management services, insurance and reinsurance brokerage, and human resources solutions and outsourcing. Through its more than 60,000 colleagues worldwide, Aon unites to deliver distinctive client value via innovative and effective risk management and workforce productivity solutions. Aon's industry-leading global resources and technical expertise are delivered locally in over 120 countries. Named the world's best broker by Euromoney magazine's 2008, 2009 and 2010 Insurance Survey, Aon also ranked highest on Business Insurance's listing of the world's insurance brokers based on commercial retail, wholesale, reinsurance and personal lines brokerage revenues in 2008 and 2009. A.M. Best deemed Aon the number one insurance broker based on revenues in 2007, 2008 and 2009, and Aon was voted best insurance intermediary 2007-2010, best reinsurance intermediary 2006-2010, best captives manager 2009-2010, and best employee benefits consulting firm 2007-2009 by the readers of Business Insurance. Visit http://www.aon.com for more information on Aon and http://www.aon.com/manchesterunited to learn about Aon's global partnership and shirt sponsorship with Manchester United.

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