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Our History

Embark on a journey of innovation and impact with Tonkin + Taylor

The foundations of our business begin in 1959 – since then we have been at the forefront of environmental and engineering solutions in New Zealand, Australia, and the Asia-Pacific Region. From working on iconic projects such as the Auckland Harbour Bridge, the Whau Valley Dam, Waterview Tunnel, the Canterbury Earthquake Recovery Project, and more, we have a rich history of achieving outcomes that benefit the communities we serve. Today, as a specialist, independent consultancy, we bring together a depth of knowledge and multi-disciplinary expertise to tackle complex challenges with nimble, responsive problem-solving. 

Join us as we continue our legacy of excellence and make a positive impact on the world.

1956

Ralph Tonkin and Don Taylor meet while working on the construction of the Auckland Harbour Bridge.

1959

Ralph Tonkin sets up a sole practice and establishes a testing business – Geotechnics Limited.

1961

Don Taylor joins the practice. Tonkin + Taylor is established.

1969

Tonkin + Taylor begins work internationally with the New Zealand Government’s Colombo Plan Mission in Malaysia and Indonesia.

1974

Tonkin + Taylor opens office in Wellington.

1981

Company restructures from a partnership to a limited liability, employee ownership model – a model that continues successfully to this day.

1994

Tonkin + Taylor opens office in Christchurch.

1996

Tonkin + Taylor opens office in Hamilton and Nelson.

2002

Tonkin + Taylor opens office in Tauranga.

2006

Victoria based testing business Chadwick Group Holdings joins Tonkin + Taylor Group.

2010

Victorian operations restructured to become Chadwick Geotechnics and Tonkin + Taylor Australia.

2019

Tonkin + Taylor Group passes 1000 employee mark.

2022

Tonkin + Taylor opens Sunshine Coast office.

2023

Tonkin + Taylor joins the Inogen Alliance.

How can we help?

Get in touch with a Tonkin + Taylor representative today. Our friendly and knowledgeable team make it easy to find the right solution to suit your specific needs.

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