Arch Insurance Group Adds Executive Assurance Operation in London; Names Jane Comerford Vice President, Executive Assurance

NEW YORK, NY--(BUSINESS WIRE)--July 11, 2003--Arch Insurance Group, a division of Arch Capital Group Ltd., has announced that Jane Comerford was named to the position of Vice President, Executive Assurance, effective June 2nd. In her new role, Ms. Comerford will focus on developing Arch's directors and officers, financial institutions and errors and omissions sector business in the London insurance market. Jane Comerford is based in the office of Arch's UK subsidiary in London at 10 Fenchurch Avenue.

Jane joins Arch with more than 25 years of expertise in errors and omissions, financial institutions and directors and officers business. Prior to coming to Arch, Jane Comerford was a director of Liberty Mutual Insurance Company (UK) Ltd., where she spent more than 9 years underwriting long tail liability business. During her career, Jane has also held various senior positions within the insurance broking market.

“We are very pleased to be able to have a person of Jane's experience join us at Arch. Her talent and abilities will contribute to the growth of our position within the European executive assurance market. She is a great addition to our team”

"We are very pleased to be able to have a person of Jane's experience join us at Arch. Her talent and abilities will contribute to the growth of our position within the European executive assurance market. She is a great addition to our team," said Thomas Gamble, Executive Vice President of the Executive Assurance Division of Arch Insurance Group.

Arch Insurance Group is a division of Arch Capital Group Ltd., a Bermuda-based company that provides insurance and reinsurance on a worldwide basis through its wholly owned subsidiaries. Arch Insurance Group's principal insurance subsidiaries - Arch Insurance Company, Arch Specialty Insurance Company and Arch Excess & Surplus Insurance Company - are rated A- (Excellent) by A.M. Best. For more information, visit www.archinsurance.com.

Cautionary Note Regarding Forward-Looking Statements

The Private Securities Litigation Reform Act of 1995 provides a "safe harbor" for forward-looking statements. This release or any other written or oral statements made by or on behalf of Arch Capital Group Ltd. and its subsidiaries (collectively, the "Company") may include forward-looking statements which reflect the Company's current views with respect to future events and financial performance.

Forward-looking statements involve the Company's current assessment of risks and uncertainties, which may cause actual events and results and prospects to differ materially from those expressed or implied in these statements. Certain information regarding such risks and uncertainties is set forth in the Company's filings with the Securities and Exchange Commission. The Company undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.