ZUG, Switzerland, Sept. 5, 2012 /PRNewswire/ -- Allied World Assurance Company Holdings, AG (NYSE: AWH) today announced strategic changes to its executive management team. Joan Dillard, currently the group's Executive Vice President and Chief Financial Officer, will be retiring effective September 24, 2012. She will be succeeded by Thomas Bradley, formerly of Dorsey & Whitney LLC, as Executive Vice President and Chief Financial Officer. In addition, John Gauthier, Allied World's Executive Vice President and Chief Investment Officer, will take on the additional role of President of Allied World's financial services company, Allied World Financial Services, Inc. Mr. Gauthier will remain the company's Chief Investment Officer. Scott Carmilani, President and Chief Executive Officer of Allied World, commented, "It is with mixed emotion that we announce Joan's retirement after over nine years of service with Allied World and more than 29 years of service in the industry. Joan has been an integral part of Allied World's executive leadership team since she joined the company, and we are grateful for her numerous contributions. During her time as CFO, Allied World has maintained a strong track record of growth and profitability throughout the market cycle. I personally wish her all the best in her retirement." Mr. Carmilani continued, "We are also very pleased to announce that effective September 24, Tom Bradley will be joining us as Allied World's new Chief Financial Officer. His expertise and superior business acumen make him uniquely qualified for this role. He inherits a strong finance department, and I am confident that he will help Allied World continue to grow during our next decade of business." Mr. Bradley joins Allied World from Dorsey & Whitney LLP, where he was Chief Financial Officer since 2011. Prior to that, he held a host of senior financial and operational positions at Fair Isaac Corporation, Zurich Financial Services, and USF&G Corporation/St Paul Companies.