ARCADIS Celebrates 50 Year Anniversary in the United States.

DENVER -- A healthy, clean and safe environment ... can you imagine life without it? From enjoying a bike ride across a beautiful structural bridge and drinking a fresh glass of water to the restoration of a Brownfield site growing the American economy. Celebrating its 50th anniversary, the U.S. operations of ARCADIS (EURONEXT: ARCAD), continues to create lasting results aimed at improving the quality of human life around the world through the use of technologies that create added value for all of its clients.

Founded in 1957, the ARCADIS U.S. operations based in Denver, Colorado, is now the largest division of its parent global company in the Netherlands. In just the past five years, ARCADIS added over 2,500 employees and 80 national offices to its U.S. operations. As a result, the company now boasts nearly 4,000 employees in 120 offices throughout the country and in 2007 ARCADIS will hire an additional 1,000 employees. While much of the growth is organic, through recent acquisitions of engineering powerhouses such as BBL, Construction Dynamic Group and more recently, Phoenix-based Pinnacle One, ARCADIS has increased capabilities and services being offered to its clients nation-wide.

"Our employees are some of the most dedicated, passionate and committed professionals in the engineering industry," said Steve Blake, CEO of ARCADIS in the U.S. "They are seeing the results of their work change the way organizations and entire societies interact within the world around them. At ARCADIS, we provide our employees the encouragement and the opportunities to use their skills to make lasting differences. While we are celebrating 50 years of operations, history starts every day at ARCADIS and we are committed to continuing our entrepreneurial spirit and client commitment for many years to come."

While ARCADIS U.S. is celebrating 50 years in operation, ARCADIS' global operations stems from a long and prominent European history dating back to 1888. Based in the Netherlands and originally named Heidemij, ARCADIS currently has more than 11,500 employees worldwide and revenues of $1.5 billion. The company's initial activities focused on improving the productivity of rural areas through land development and water management projects in developing countries. In the years that followed, ARCADIS continued to expand both geographically and in terms of service offerings, constantly striving to meet clients' request for integrated solutions.

ARCADIS' employees strive to improve their local communities by volunteering time, and donating funds to several worthy causes in the communities where they work and live. ARCADIS will commemorate its 50th anniversary by sponsoring and participating in community activities such as Adopt-a-Highway programs, Habitat for Humanity projects and local Arbor Day celebrations.

ARCADIS is one of the first consulting engineering companies to pioneer the global platform. In the 1950s ARCADIS, which was then known as Geraghty & Miller, began its distinguished history in groundwater remediation and has grown to become a leading environment and infrastructure firm. Today, ARCADIS' 4,000 U.S. employees provide services for public and private sector clients in the fields of environment, infrastructure and facilities. In 2006, U.S. operations had the largest organic growth of 15 percent and grew the U.S. revenue contribution to represent 42 percent of overall global operations.

ARCADIS is an international company providing consultancy, engineering and management services in infrastructure, environment and facilities, to enhance mobility, sustainability and quality of life. ARCADIS develops, designs, implements, maintains and operates projects for companies and governments. With more than 11,000 employees and over $1.7 billion in gross revenue, the company has an extensive international network that is supported by strong local market positions.