Changes in ARCADIS Executive and Supervisory Board

AMSTERDAM, November 13 - ARCADIS (EURONEXT: ARCAD), the international design, consulting,
engineering and management services company, announced that in yesterday's
Extraordinary General Meeting of Shareholders Mr. Steven B. Blake has been
appointed to its Executive Board as of January 1, 2010 and Mr. Armando R.
Perez has been appointed to its Supervisory Board commencing immediately.
Both are United States citizens and their appointments relate to the
expansion of ARCADIS in recent years, especially in the U.S., most recently
through the merger with Malcolm Pirnie.

(Photo: www.newscom.com/cgi-bin/prnh/20091113/366746-a )

(Photo: www.newscom.com/cgi-bin/prnh/20091113/366746-b )

Mr. Blake is currently the CEO of ARCADIS U.S., Inc., which includes the
environmental, infrastructure and project and construction management
businesses in the United States, as well as the recently added activities of
Malcolm Pirnie. He will combine this role with his new position on the
Executive Board and will also assume responsibility for the environmental
business line of ARCADIS. Mr. Blake has been with ARCADIS U.S. and
predecessor companies since 1987 in various managerial roles. Given his
experience in the industry and the successful leadership he has provided to
ARCADIS' U.S. operations, the Supervisory Board considers him eminently
qualified to assume his expanded role.

Mr. Perez was an external member of the Board of Malcolm Pirnie until
that company joined ARCADIS in July 2009. As such he has broad knowledge of
the consultancy and engineering business particularly with the water related
activities of Malcolm Pirnie. He has spent almost his entire professional
career with Exxon and ExxonMobil in senior managerial roles at the local,
regional and global levels. The experience of Mr. Perez with a major
multinational company is also relevant in view of ARCADIS' ambition to expand
its business with this client category across the globe.

About ARCADIS:

ARCADIS is an international company providing consultancy, design,
engineering and management services in infrastructure, environment and
buildings. We aim to enhance mobility, sustainability and quality of life by
creating balance in the built and natural environment. ARCADIS develops,
designs, implements, maintains and operates projects for companies and
governments. With more than 15,000 employees and over EUR 2.0 billion in
revenues, the company has an extensive international network that is
supported by strong local market positions. Visit us on the internet at:
www.arcadis-global.com

PRN NLD

For more information please contact: Joost Slooten of ARCADIS at +31-26-3778604 or outside office hours at +31-6-27061880, or e-mail at j.slooten at arcadis.nl