Chadwick Group Holdings Pty Ltd began trading as T J Chadwick Geotechnical Pty Ltd in 1996, later changing to Chadwick Group Holdings Pty Ltd in 2001.

In July 2006, Chadwick T&T Pty Ltd was established. This combined Chadwick Group Holdings Pty Ltd (specialists in the fields of geotechnical and environmental services), with Tonkin and Taylor Ltd (T+T), a highly regarded international environmental and engineering consultancy.

In May 2010, our Australian operations were restructured to become:

• Chadwick Geotechnics Pty Ltd (Geotechnical and Environmental Field, Laboratory and Drilling Services)

• Tonkin + Taylor Pty Ltd (Professional Engineering and Environmental Consulting Services)

T+T was established in 1959 and now has offices throughout Australia and New Zealand. The T+T group has a proven track record providing innovative, cost-effective, and sustainable solutions for geotechnical engineering projects. T+T are also experts in the fields of environmental science and resource management, waste disposal and coastal and port engineering.