Aviva Investors announced Tuesday it hired Pat O’Brien as chief executive officer of Aviva Investors North America Inc.

O'Brien will be responsible for Aviva's operations in the United States and Canada, reporting to Alain Dromer, the London-based company's chief executive officer. O'Brien, who will be based in Chicago, will also join the parent company's global executive committee.

He has worked for Evergreen Investment Management, the asset management arm of Wachovia Corp., since 2000. Initially, he was president of institutional asset management and, between 2008 and 2009, he was head of international for Wachovia Global Asset Management. 

Before being hired by Evergeen, He worked for Banc One Investment Advisors Corp., for eight years, initially as managing director and, from 1995 to 2000, as senior managing director. 

Dromer said O'Brien was hired to increase Aviva's institutional assets under management. Dromer said O'Brien will play "an important role as the primary local contact between Aviva Investors and our colleagues from the Aviva life and general insurance businesses in North America and, notably in this context, his strong understanding of fixed income investments, an asset class at the heart of our own business, will be particularly valuable.”