(ticker symbol AON) calls itself the leading global provider of risk management services, insurance and reinsurance brokerage and human resources consulting and outsourcing. The Chicago-based company's presence in Central Florida expanded greatly in 2010 when it acquired human resources outsourcing and consulting firm Hewitt Associates
2011 rank: 49
2010 rank: 42
Full-time employees in 2011: 1,515
Part-time employees in 2011: 16
Total employees in 2011: 1,531
Total employees in 2010: 2,012
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