Arcadis NV is a global design, engineering and management consulting company based in the Zuidas, Amsterdam, Netherlands. It currently operates in more than 350 offices in 40 countries. The company is a member of the Next 150 index.

Arcadis was founded as the land reclamation specialist Nederlandsche Heidemaatschappij in 1888. Over the following decades, the firm became involved in various development projects, initially with a rural focus. As a consequence of a restructuring in 1972 that divided the company, it became Heidemij. During 1993, the firm merged with the North American business Geraghty & Miller, resulting in its listing on the Nasdaq index.

During 1997, the company adopted its current name, Arcadis; subsidiaries were similarly rebranded. Since 1990, the company has largely expanded itself via a series of acquisitions and mergers, which have allowed it to both expand its presence in existing markets as well as to enter new ones. It performs design and consultancy services on a wide variety of undertakings. Arcadis (either directly or via subsidiaries) has been involved in several high profile construction projects, including London City Airport and the A2 motorway.

The company has its origins in the Nederlandsche Heidemaatschappij (English: Association for Wasteland Redevelopment), a land reclamation company founded in the Netherlands in 1888. As such, its original business focus was on the encouragement of agricultural development in the Dutch heather lands.

In the early 20th century the Heidemaatschappij was involved in all aspects of rural development including irrigation and forestry. In 1972, it was decided to heavily restructure the company, resulting in its division into two separate entities, the Association (or KNHM), which continued the company's traditional activities, and Heidemij, which became the commercial arm.

In 1993, the company merged with Geraghty & Miller, granting the new Arcadis a presence in the North American market and an initial listing on the Nasdaq index. Geraghty and Miller, headquartered in Long Island, New York, was subsequently rebranded as Arcadis North America.

Two years later, Heidemij became a listed company on the Next 150 index. During October 1997, the company opted to rebrand itself, changing its name to Arcadis. Two years later, it established a presence in the Brazilian market via the firm's acquisition of Logos Engenharia.

In June 2005, Axtell Yates Hallett was acquired and became a subsidiary of Arcadis NV, being rebranded as Arcadis UK. AYH was a British quantity surveying firm, founded by Stanley Axtell and his colleagues Messrs Yates and Hallett in the City of London in 1946. Since 1946, Axtell Yates Hallett firm grew steadily and broadened both its service base to include firstly project management and subsequently building surveying and facilities consultancy and its area of operation with the opening of regional and overseas offices in the United Kingdom. Following a period of retrenchment during the economic recession of the beginning of the 1990s, the firm was incorporated as the AYH Partnership in February 1994. One of the firm's last projects was Arsenal F.C.'s Emirates Stadium.