Aon, a provider of risk management services, insurance and reinsurance brokerage, has completed its merger of Hewitt Associates with a subsidiary of Aon, creating Aon Hewitt, a human capital solutions firm.

Aon Hewitt now boasts of a combined revenue of $4.3bn and around 29,000 employees globally.

In 2009, the joint revenue included of 49% from consulting services, 40% from benefits administration and 11% from HR business process outsourcing. It has a presence in more than 120 countries around the globe.

Aon CEO and president Greg Case said that the completion of this merger marks yet another important milestone in the history of Aon and is an industry-changing event that will create new standards in the human capital space.

Through Aon Hewitt, we will provide our clients with a broader portfolio of innovative products and services focused on what we believe are two of the most important topics facing today’s global economy – risk and people, Case said.