Allied World Asia Announces Susan Chmieleski and Peter Ford to Speak at Hospital Management Asia 2010 Conference

PEMBROKE, Bermuda, August 11, 2010 - Allied World Assurance Company Holdings, Ltd (NYSE: AWH) announced today
that Susan Chmieleski, Senior Vice President, Healthcare and Risk Management
for Allied World U.S. and Peter Ford, Vice President and Head of Healthcare
Liability for the Asia Pacific region, will be speaking at the Hospital
Management Asia 2010 conference. The event takes place in Seoul, Korea from
August 19-21. Ms. Chmieleski's speaking topic is "Organizing for Safety: How
to Establish a Risk Management Department." Mr. Ford will speak on "The
Tangible Benefits of Risk Management in Patient Safety: Why it's Cost
Effective and How it Leads to Better Service."

As Senior Vice President for Healthcare and Risk Management, Ms.
Chmieleski is responsible for the development of products for
healthcare-related business and risk management / loss control services for
all Allied World U.S. products. She oversees an in-house team that provides
consulting and client services to policyholders, helping them assess and
manage their organizational risk. Ms. Chmieleski has authored numerous
published risk management articles and brochures and is a frequent presenter
at industry conferences. Ms. Chmieleski obtained her Bachelor of Science
degree, summa cum laude, from the University of Hartford. She earned her
Juris Doctorate degree from the University of Connecticut School of Law,
where she was editor-in-chief of the Connecticut Law Journal. Ms. Chmieleski
holds Connecticut Law and Nursing Licenses and is an Advanced Practice
Registered Nurse. She is a current ASHRM board member.

Mr. Ford is based in Hong Kong and leads the Healthcare Liability team.
He is responsible for growing the book of business regionally and for the
development of healthcare products and services. Prior to joining Allied
World, Mr. Ford held various management positions for AIG in New York, Hong
Kong and Singapore. He graduated with a Master's Degree from the University
of Chicago and a Bachelor's Degree from Villanova University.

About Allied World Assurance Company

Allied World Assurance Company Holdings, Ltd, through its subsidiaries,
is a global provider of innovative property, casualty and specialty insurance
and reinsurance solutions, offering superior client service through a global
network of branches and affiliates. Our insurance and reinsurance
subsidiaries are rated A (Excellent) by A.M. Best Company, and our Lloyd's
Syndicate 2232 is rated A+ (Strong) by Standard & Poor's and Fitch. Please
visit our website at www.awac.com for further information on Allied
World.

Cautionary Statement Regarding Forward-Looking Statements

Any forward-looking statements made in this press release reflect our
current views with respect to future events and financial performance and are
made pursuant to the safe harbor provisions of the Private Securities
Litigation Reform Act of 1995. Such statements involve risks and
uncertainties, which may cause actual results to differ materially from those
set forth in these statements. For example, our forward-looking statements
could be affected by pricing and policy term trends; increased competition;
the impact of acts of terrorism and acts of war; greater frequency or
severity of unpredictable catastrophic events; negative rating agency
actions; the adequacy of our loss reserves; the company or its subsidiaries
becoming subject to significant income taxes in the United States or
elsewhere; changes in regulations or tax laws; changes in the availability,
cost or quality of reinsurance or retrocessional coverage; adverse general
economic conditions; and judicial, legislative, political and other
governmental developments, as well as management's response to these factors,
and other factors identified in our filings with the U.S. Securities and
Exchange Commission. You are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We are under no obligation (and expressly disclaim any such obligation)
to update or revise any forward-looking statement that may be made from time
to time, whether as a result of new information, future developments or
otherwise.

Media, Faye Cook, VP, Marketing & Communications, +1-441-278-5406, faye.cook at awac.com; or Investors: Keith J. Lennox, Investor Relations Officer, +1-646-794-0750, keith.lennox at awac.com