The firm has its roots traced to the quantity surveying practice in the United Kingdom of "Horace W Langdon & Every", founded in 1919, which had bought the Singaporean firm of "Waters & Watson" to form "Horace W Langdon & Every incorporating Waters & Watson" in 1946 [REF].
In April 2012, the group merged with Arcadis, an international consultancy, design, engineering and management services company.