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Horace Langdon opens an office in Holborn, London.
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Tom Every joins Langdon and the firm’s name becomes Horace W Langdon & Every.
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The firm acquires the Singapore QS practice of Waters & Watson and begins expanding in colonial South-east Asia.
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During the Second World War the Singapore office is run by Seah Mong Hee - the first Chinese quantity surveyor - until the Japanese occupy the colony in February 1942.
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Post-war boom years Following Japan’s surrender in 1945
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Langdon & Every becomes Langdon Every & Seah in 1969, in recognition of the contribution by Seah Mong Hee in the Far East. Further offices in Jakarta, Manila, Bangkok and Sydney soon follow.
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Langdon & Every merge with Davis Belfield & Everest to create Davis Langdon & Everest in the UK. In 1990 Davis Langdon Seah was formed, bringing together the various firms worldwide.
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Aecom founded by Dick Newman
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The US consultancy started to win work on major projects including Puerto Rico’s Tren Urbano light rail mass transit line
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Aecom becomes an independent company with $859.5m worth of revenue
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Aecom now has 15,500 employees worldwide
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Rob Smith becomes senior partner.
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Davis Langdon & Everest convert to a limited liability partnership and changes its name to Davis Langdon.
Davis Langdon Seah remains as a separate business. -
John Dionisio takes on the role of President and CEO of the company
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Aecom becomes a publically traded company on the New York Stock Exchange
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Davis Langdon buys architect DEGW.
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Building reveals DL is in merger talks with Aecom.
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Aecom adds Davis Langdon to a list of over 30 other companies that have joined the US giant. The firm is now operating in around 125 countries around the world
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Aecom announces that it is to acquire Davis Langdon