Denver, Colo. – Nov. 8, 2007 - ARCADIS (EURONEXT: ARCAD), the international consulting and engineering company, today announced it was ranked as one of the top 20 fastest growing architecture, engineering and engineering consulting firms in the United States. The ranking, came in the 8th annual Zweig Letter Hot Firm 2007 and identified ARCADIS as No. 14 based on percentage growth and dollar growth. The survey also named ARCADIS as one of the top three consulting engineering firms and one of the top 10 large firms in the U.S.

“ARCADIS is honored to be continually ranked at the top of our industry,” said Steve Blake, President and CEO of ARCADIS’ U.S. Operations, based in Highlands Ranch, Colorado. “While our ranking from a pure expansion perspective can be attributed to the high level of organic and acquisition growth, ARCADIS, U.S. has experienced recently, at the end of the day, our growth is really defined by ARCADIS’ superior capabilities and services our staff takes great pride in delivering to our clients.”

Year after year ARCADIS continues to be knowledge leaders in the engineering industry. The strategic business plan has positioned them to gain continue to gain momentum across the U.S. in environmental and industrial engineers.

Management consulting and research firm Zweig White Information Services identified the 200 fastest-growing U.S. architecture, engineering, and environmental consulting firms for its annual ranking, The Zweig Letter Hot Firm List. This annual list features the design and environmental firms that have outperformed the economy and competitors to become industry leaders. Currently more than 90,000 firms make up the architecture, engineering, and engineering consulting industry.

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 12,000 employees and over $1.9 billion in gross revenue, the company has an extensive international network that is supported by strong local market positions.