[5] GHD employs more than 11,000 people—engineers, architects, planners, scientists, project managers and economists— operating in over 160 offices across five continents serving clients in water, energy and resources, environment, property and buildings, and transportation markets.

During the 2000s GHD continued to grow through a series of mergers and acquisitions in the US, Canada, Europe, Australia, New Zealand, the Middle East, China, Chile and Malaysia.

[7] In 2014, GHD merged with Canadian firm Conestoga-Rovers & Associates in one of the largest private stock transactions in the engineering and environmental consulting industry, creating a combined company of 8,500 employees.

[26] The American Council of Engineering Companies of California honored GHD for Comprehensive Large-Scale Habitat Restoration for the wetland mitigation work the firm did with for the Border Coast Regional Airport Authority.

[29] GHD received an Award of Merit, Environmental from Engineering News-Record for the firm's involvement in the closure of a Puerto Rico Dump and the construction of Eloy S. Inos Peace Park.