Katie Rooney is just about a month into her new role atinsurance brokerage Aon Corp. as chief operating officer for globalfinance and shared services. It's a quick move forward for the32-year-old Chicago area native, who previously served as Aon'sassistant treasurer for corporate finance/mergers andacquisitions.

Rooney attended the University of Michigan and then spent thefirst nine years of her career at Morgan Stanley. Her last positionwas vice president in investment banking in the healthcare group,where she worked with medical technology companies on all aspectsof their debt, equity and M&A activity.

A year after joining Chicago-based Aon in 2009, Rooney led ateam that managed the financing for Aon Consulting's $4.9 billionacquisition of Hewitt Associates, the largest in Aon's history. Shealso helped implement a new $2 billion share buyback program andwas instrumental in managing capital structure, includingoptimizing the maturity, yield and refinancing risk of more than $4billion in corporate debt.