Visit Arch Corporate
  • Affiliates
  • Media Center
  • Careers
  • Contact Us
ACGL $94.51 -0.27 (-0.28%)

Executive Management

Constantine Iordanou

Chairman and Chief Executive Officer

Executive Management

Arch Capital Group Ltd.

Constantine Iordanou

Constantine Iordanou has been Chairman of the Board of ACGL since November 6, 2009 and Chief Executive Officer of ACGL since August 2003. He has been a director since January 1, 2002. From January 2002 to July 2003, Mr. Iordanou was Chief Executive Officer of Arch Capital Group (U.S.) Inc. From March 1992 through December 2001, Mr. Iordanou served in various capacities for Zurich Financial Services and its affiliates, including as Senior Executive Vice President of group operations and business development of Zurich Financial Services, President of Zurich-American Specialties Division, Chief Operating Officer and Chief Executive Officer of Zurich-American and Chief Executive Officer of Zurich North America. Prior to joining Zurich, he served as President of the commercial casualty division of the Berkshire Hathaway Group and served as Senior Vice President with the American Home Insurance Company, a member of the American International Group. Since 2001, Mr. Iordanou has served as a director of Verisk Analytics, Inc. (formerly known as ISO Inc.). He holds an aerospace engineering degree from New York University.

Marc Grandisson

President and Chief Operating Officer

Executive Management

Arch Capital Group Ltd.

Email

Marc Grandisson

Marc Grandisson was promoted to President and Chief Operating Officer of ACGL on January 1, 2016. Prior to that role, he had been the Chairman and Chief Executive Officer of Arch Worldwide Reinsurance Group from 2005 to 2015, and the Chairman and Chief Executive Officer of Arch Worldwide Mortgage Group from February 2014 to December 2015. He joined Arch Reinsurance Ltd. in October 2001 as Chief Actuary. He subsequently held various leadership roles, including Chief Underwriting Officer and Actuary, President and Chief Operating Officer, eventually being named President and Chief Executive Officer at Arch Reinsurance Ltd. Prior to joining Arch, he held various positions with the Berkshire Hathaway Group, F&G Re, Inc. and Tillinghast/Towers Perrin. He holds a B.Sc. in Actuarial Science from Université Laval in Canada and an M.B.A. from The Wharton School of the University of Pennsylvania. He is a Fellow of the Casualty Actuarial Society and a Member of the American Academy of Actuaries.

Mark D. Lyons

Executive Vice President, Chief Financial Officer

Executive Management

Arch Capital Group Ltd.

Email

Mark D. Lyons

Mark D. Lyons is Executive Vice President, Chief Financial Officer and Treasurer of ACGL. He joined Arch in 2002, and served in various capacities within Arch Insurance U.S. operations, eventually rising to Chairman and Chief Executive Officer of Arch Worldwide Insurance Group. Prior to joining Arch, Mark held various positions at Zurich U.S., Berkshire Hathaway and American International Group. Mr. Lyons has a B.S. in mathematics from Elizabethtown College, is a Member of the American Academy of Actuaries and is an Associate of the Casualty Actuarial Society. He has also completed the Executive Program at the Kellogg School of Management of Northwestern University.

David McElroy

Chairman and CEO, Arch Worldwide Insurance Group

Executive Management

Arch Insurance Group Inc.

Email

David McElroy

David H. McElroy has served as Chairman and Chief Executive Officer of Arch Worldwide Insurance Group, an executive position of ACGL, since September 2012, and Chairman and Chief Executive Officer of Arch Insurance Group since July 2012. He also serves as a member of the Arch Capital's Executive Strategy Committee. He joined Arch Insurance Group in 2009 as the President of the Financial and Professional Liability Group, which is comprised of the executive assurance, professional liability, surety and healthcare lines. Prior to joining Arch Insurance Group, Mr. McElroy was a Senior Vice President at The Hartford Financial Services Corporation. He joined Hartford in 2000 from the acquisition of the directors and officers and errors and omissions business of Reliance National. He started his career at Chubb. Mr. McElroy is a graduate of Temple University with a B.A. in business administration.

Nicolas Papadopoulo

Chief Executive Officer, Reinsurance Group

Executive Management

Arch Capital Group Ltd.

Email

Nicolas Papadopoulo

Nicolas Papadopoulo is Chief Executive Officer, Reinsurance Group at Arch Capital Group Ltd. Since joining Arch Reinsurance Ltd. in December 2001, he held a variety of underwriting roles, eventually becoming Chief Executive Officer. Mr. Papadopoulo was promoted to his current position in July 2014. Prior to joining Arch, he held various positions at Sorema N.A. Reinsurance Group, a U.S. subsidiary of Groupama, and he was also an insurance examiner with the Ministry of Finance, Insurance Department, in France. Mr. Papadopoulo graduated from École Polytechnique in France and École Nationale de la Statistique et de l’Administration Economique in France with a master’s degree in statistics. He is also a member of the International Actuarial Association and a Fellow at the French Actuarial Society.

Andrew Rippert

Chief Executive Officer, Global Mortgage Group

Mortgage Insurance

Arch Capital Group Ltd.

Email

Andrew Rippert

Andrew Rippert is Chief Executive Officer, Global Mortgage Insurance and Reinsurance at ACGL. Prior to taking on this role, he served as President and Chief Executive Officer of Arch MI in Ireland since December 2011. He joined Arch Insurance European operations in September 2010 as a Senior Vice President, transferring to Arch Reinsurance Ltd. in December 2011, where he served as Senior Executive of mortgage insurance. Prior to joining Arch, Mr. Rippert worked as a consultant to mortgage insurers and mortgage-backed security investors, and held various positions at Radian Guaranty Inc., a subsidiary of Radian Group Inc. including Senior Vice President and Managing Director of the international mortgage insurance group. He has also worked in reinsurance as an actuary and underwriter. He holds undergraduate degrees in physics and mathematics from Drexel University and an M.B.A. from The Wharton School of the University of Pennsylvania. He is a Fellow of the Casualty Actuarial Society and a member of the American Academy of Actuaries.

W. Preston Hutchings

Senior Vice President and Chief Investment Officer

Investments

Arch Capital Group Ltd.

Email

W. Preston Hutchings

W. Preston Hutchings is President of Arch Investment Management Ltd. and Senior Vice President and Chief Investment Officer of ACGL. Prior to joining Arch, Preston held senior level positions at RenaissanceRe Holdings Ltd., Mid Ocean Reinsurance Company Ltd., and J.P. Morgan & Co. He graduated in 1978 with a B.A. from Hamilton College in Clinton, New York, and received in 1981 an M.A. in Jurisprudence from Oxford University, where he studied as a Rhodes Scholar.

John Mentz

President

Arch Insurance Group Inc.

Email

John Mentz

John Mentz is President of Arch Insurance Group Inc., a role he has held since December 2014. In this capacity, Mr. Mentz is responsible for all Arch U. S. underwriting divisions. He joined Arch in October of 2002 as Executive Vice President Construction. In his most recent role, in addition to Construction he had ultimate responsibility for National Accounts Casualty, Alternative Markets, High Excess Workers Compensation and Lenders Products. Prior to Arch, he served in a variety of senior management positions with Zurich and the St. Paul. John is a Fellow of the Casualty Actuarial Society.

Louis Petrillo

President and General Counsel

Legal

Arch Capital Services Inc.

Louis Petrillo

Louis Petrillo is the President and General Counsel of Arch Capital Services Inc., a position he has held since April 2002. From May 2000 to April 2002, he was Senior Vice President, General Counsel and Secretary of ACGL. From 1996 until May 2000, Mr. Petrillo was Vice President and Associate General Counsel of ACGL’s reinsurance subsidiary. Prior to that time, Mr. Petrillo practiced law at the New York firm of Willkie Farr & Gallagher LLP. He holds a B.A. from Tufts University and a law degree from Columbia University.