ARCADIS Finalizes Merger With Malcolm Pirnie, Becoming a Major Player in Global Water...

ARCADIS Finalizes Merger With Malcolm Pirnie, Becoming a Major Player in
Global Water Market

DENVER, July 10 /PRNewswire-FirstCall/ -- ARCADIS (EURONEXT: ARCAD), the
international consultancy, design, engineering and management services
company, has finalized the previously announced merger with Malcolm Pirnie,
the White Plains, New York based company active in water and environmental
consulting and engineering. All internal shareholders, representing 100% of
the share capital of Malcolm Pirnie, voted in favor of the merger, showing
that this major step is fully supported by management and senior staff of the
company. Malcolm Pirnie, now a wholly-owned subsidiary of ARCADIS U.S., has
more than 1,700 employees with 2008 gross revenues of $392 million (euro 280
million). The financial terms of the transaction were disclosed on June 25,
2009 and can be found on the investors and press section of ARCADIS' website
at www.arcadis-global.com.

(Logo: http://www.newscom.com/cgi-bin/prnh/20090710/LA44654LOGO)

Commenting on the merger, ARCADIS CEO Harrie Noy said: "I am very pleased with
the acceptance of our merger offer by all of the Malcolm Pirnie shareholders.
This step makes us a major player in the highly attractive global water market
and strongly enhances our position in infrastructure and environment, while
providing a better balance in our public and private sector client mix in the
U.S. In addition, we expect significant business and operational synergies. I
wholeheartedly welcome the Malcolm Pirnie people to ARCADIS and feel excited
about the increased opportunities created by our combined future."

William P. Dee, President & CEO of Malcolm Pirnie added: "The broad support
among our shareholders and staff signifies the strategic relevance of this
bold step. By joining ARCADIS we create a world leader in water-related
consulting and engineering services, with a global platform that allows us to
expand our services internationally. Broadening our services and geography
fits very well with our philosophy of 'clients first' and greatly enhances
opportunities for our staff. We look forward to working with the people of
ARCADIS to create solutions for life, here - and throughout the world."

About ARCADIS

ARCADIS is an international company providing consultancy, design, engineering
and management services in infrastructure, environment and buildings, to
enhance mobility, sustainability and quality of life. ARCADIS develops,
designs, implements, maintains and operates projects for companies and
governments. With more than 13,500 employees and over $2 billion in gross
revenues, the company has an extensive international network that is supported
by strong local market positions. Visit us on the internet: www.arcadis-US.com

About Malcolm Pirnie

Malcolm Pirnie Inc, is a century -old environmental consulting firm, provides
governmental and industrial clients with comprehensive services in water and
wastewater engineering, solid and hazardous waste management, environmental
sciences and, through its Red Oak Consulting Division, a wide range of
management and IT consulting services. With a diversified staff of over 1,700
engineers, scientists and consultants in 60+ offices, Pirnie has won over 200
professional awards for project excellence. For more information visit
www.pirnie.com.

SOURCE ARCADIS

Jeanna Blatt of ARCADIS, +1-303-471-3485, or outside office hours,
+1-303-910-6504, Jeanna.blatt@arcadis-us.com