Arch Insurance Group Names Dennis Brand Executive Vice President, Corporate Underwriting & Risk Management

NEW YORK--(BUSINESS WIRE)--June 15, 2006--Arch Insurance Group, a subsidiary of Arch Capital Group Ltd., announced that Dennis Brand has been promoted to the position of Executive Vice President, Corporate Underwriting and Risk Management. In his new role, Mr. Brand will assume responsibility for Arch Insurance Group's corporate underwriting and risk management functions in addition to ceded reinsurance which he currently manages.

"Dennis has done an outstanding job constructing a top notch reinsurance program for Arch during his three year tenure as our Chief Reinsurance Officer. I am very pleased to recognize Dennis for his accomplishments," said Ralph Jones, Chairman and CEO, Arch Insurance Group.

“Dennis has done an outstanding job constructing a top notch reinsurance program for Arch during his three year tenure as our Chief Reinsurance Officer. I am very pleased to recognize Dennis for his accomplishments”

Mr. Brand joined Arch Insurance Group in February 2004 as Senior Vice President and Chief Reinsurance Officer. He has over 29 years of insurance industry experience. Before joining Arch Insurance Group, he served as Senior Vice President and Chief Risk Officer at Kemper Insurance Company. Prior to that, he was Executive Vice President of Ceded Reinsurance at Reliance National. Mr. Brand holds a degree in Business Administration (BA) from West Virginia University, Morgantown, West Virginia.

Arch Insurance Group Inc. 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 and "A-" (Strong) from Standard and Poor's. 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.