Regan will stay until early 2010

Willis has initiated a search for a new chief financial officer to replace CFO and Group Chief Operating Officer Patrick Regan, who leaves in early 2010 to join Aviva.

Regan will remain at Willis through the year-end reporting and regulatory filing process for 2009 before joining Aviva, the world’s fifth largest insurance group, as CFO.

Willis has hired Spencer Stuart to assist with the recruitment process.

Joseph Plumeri, the Chairman and CEO of Willis, said: “In the past four years, Pat has contributed greatly to our efforts to grow Willis’ business and strengthen our financial and operating performance. We appreciate Pat’s many contributions to our company, as well as his commitment to remain fully engaged at Willis through our 2009 year-end reporting and regulatory filing process. We congratulate Pat and wish him well on the exciting opportunity he is taking with Aviva. Meanwhile, we are moving quickly to identify the best possible candidate to succeed Pat and help take Willis to the next level.”

Regan said: “It has been a privilege to be a part of Willis’ outstanding management team, which has helped cement Willis’ position as the most client-focused global brokerage in the industry. As I embark on the next stage of my career, I am confident that under Joe Plumeri’s leadership and with the breadth and depth of the senior executive team behind him, Willis will continue to thrive and grow.”

Regan joined Willis as an Executive Officer in January 2006. He has been CFO since March 2006 and Group COO since 2008.