2008

• Hassall & Associates, a consulting firm specialising in International Development Assistance, agriculture, natural resource & environmental issues.

2007

• Leddy Sergiacomi & Associates, a Queensland engineering and environmental consultancy company
• ProAnd, a New Zealand specialist meat process design engineering consultancy
• PCT Engineers, a Western Australia/Queensland consultancy company providing engineering services to the Oil, Gas and Mining sectors

2006

• Rankine & Hill, a Hong Kong consulting engineering company
• Archispace, a provider of urban planning, architectural and landscape design services throughout China
• Formed an alliance with London based AMCL, and opened offices in York and London (shared with AMCL)

2005

• AJP, a Malaysian consulting engineering company
• Qest Consulting, provider of specialist risk assessment and safety risk management services
• Auckland City Council’s design business, City Design, and the related practice, Civil Design Services, located in Lower Hutt near Wellington

2004

• Baker Saran, a provider of multi-disciplinary consulting engineering services, based in Orange, New South Wales
• Adelaide-based Resource Development architectural and project management teams

2003

• 2003 marked 75 years of operations for GHD. GHD paid tribute to the clients, projects and personnel that have shaped the company through the decades. View GHD History Book (672KB pdf)

2002

• Egis Consulting Australia (formerly CMPS&F), provider of management services in engineering, infrastructure and the environment, and the oil and gas, building engineering, process, information technology and telecommunications industries
• Geo-Eng Group, a provider of engineering, scientific and business services throughout Australia and the Asian region
• Taywood Engineering. in Australia and the United Arab Emirates, is renowned for its scientific understanding of all forms of concrete deterioration, corrosion protection for the oil and gas and mining sectors, and material selection
• The Newman Group, a provider of consulting in forestry and forest products for more than 25 years

2001

• Wellington-based Smith and Wood, consultants in civil, structural and mechanical engineering services
• MME, with offices in the Persian Gulf, providing architectural, structural, mechanical and electrical consulting engineering services

2000

• Martin & Co in Gladstone

1999

• The Australian affiliate of Flack + Kurtz, New York, one of the world's leading building technology firms
• Brisbane-based Integrated Pipeline Services (IPS), specialists in high-pressure oil and gas pipeline project management and design
• Auckland-based Manukau Consultants Limited, specialising in civil engineering, management and planning services, environmental, surveying and soil testing

1998

• Corcoran Shepherd Consultants, Melbourne-based specialists in concrete design
• G B Hill, Perth-based consulting engineers

1997

• WORKS Australia, the former business division of the Federal Government's Department of Administrative Services
• LongMac Group, Sydney-based consulting geotechnical engineers, geologists and environmental scientists
• Looten Engineers, Kalgoorlie-based consultants in engineering and project management

1995

• Sydney-based TW Crow Associates (TWCA), consultants to the building industry in project management, asset management, project support and project audits
• Water Corporation of Western Australia's water engineering group