Chicago-based insurance broker Aon said it has consolidated five business units under the umbrella of one chief executive and made other management changes.

Aon Global, the new entity, will consist of the company's former Global Large Corporate business unit, Captives Services Group, International Risk Management Group, Risk Consulting and Risk Engineering business units, among others.

Dennis Mahoney will assume the role of chairman for Aon Global, while Steve McGill will be the new unit's chief executive officer.

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