LOS ANGELES (May 20, 2011) – Aon Risk Solutions, the global risk management business of Aon Corporation (NYSE: AON), today announced Jamin Valdez has joined the Los Angeles office as account executive.

In his new role, Valdez is responsible for delivering specialized solutions related to environmental risk management.

Building on six years of experience as an environmental consultant, Valdez most recently served as an environmental risk specialist with DLD Insurance Brokers, a regional brokerage in Southern California. He led the environmental team as well as focused on new client development. Prior to that role, Valdez was an underwriter with Chartis Environmental, where he evaluated environmental risks for complex commercial accounts.

“Jamin’s proven management skills and focused work experience extends the environmental team’s leadership position in Southern California,” said Mike Szot, chief operating officer of Aon Risk Solutions’ Environmental Practice. “His wealth of knowledge and innate ability to execute innovative risk solutions will be of significant value to our clients, helping to meet and exceed their expectations.”

Valdez earned a Bachelor of Science degree in environmental engineering technology from Lake Superior State University. He is based in Aon’s Irvine, Calif. and Los Angeles offices.

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Media Contacts:

Kelly Drinkwine                        Cybil Rose            

312.381.2684                              312.755.3537

kelly.drinkwine@aon.com    cybil.rose@kemperlesnik.com

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 59,000 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.