Our Members


Tonkin is a leading provider of engineering, environmental and related services to private and public organisations.
Founded in 1955, Tonkin is proudly employee-owned and operated. They provide engineering and associated services to the key markets of water, waste, environment, transport, public works, and development.
From its inception, Tonkin established itself as an innovator with the development of Australia’s first stormwater modelling computer application.
A reputation for engineering advancement and cutting-edge technology has been a constant thread throughout their history, and has seen the company diversify into transport engineering, environmental engineering, water engineering, spatial consulting and asset management.
After humble beginnings as a small business, Tonkin has grown to become an accomplished consultancy with a national footprint across Australia.
Their vision is to be a national leader in sustainable infrastructure that connects people and improves communities.