Insights

Sustainable leadership Tonkin positions itself as a holistic engineering and environmental consultancy focused on sustainable outcomes, indicating potential upsell opportunities in green infrastructure, climate resilience, and environmentally integrated design projects with public sector and developers.

Growing markets The firm notes rapid growth areas across buildings, environmental, land development, transport, and water sectors, suggesting cross-selling potential across multiple services as client projects expand and client portfolios diversify.

Scale and footprint With a workforce of 201-500 and a recent expansion through acquisitions, Tonkin is expanding its national footprint, presenting opportunities for enterprise-level service contracts, multi-site projects, and standardized consulting frameworks.

Digital edge Investment in high-caliber staff and industry-leading tools, plus a tech stack including Microsoft 365, Azure, Teams, and Notion, indicates receptiveness to integrated digital workflows, data-enabled design, and recurring collaboration platforms for large programs.

Public sector alignment Tonkin services municipal councils and government departments, highlighting potential sales channels for long-term infrastructure programs, regulatory-compliant deliverables, and value-led proposals in water, waste, and transport sectors.

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Tonkin Tech Stack

Tonkin uses 8 technology products and services including Veeam, Microsoft 365, SendGrid, and more. Explore Tonkin's tech stack below.

Media & News

Tonkin's Email Address Formats

Tonkin uses at least 3 email formats:
Tonkin Email FormatsExamplePercentage
First.Last@tonkin.com.auJohn.Doe@tonkin.com.au
92%
Last@tonkin.com.auDoe@tonkin.com.au
7%
F.Last@tonkin.com.auJ.Doe@tonkin.com.au
1%

Frequently Asked Questions

What is Tonkin's phone number?

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You can contact Tonkin's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Tonkin's stock symbol?

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Tonkin is a publicly traded company; the company's stock symbol is 8326.HK.

What is Tonkin's official website and social media links?

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Tonkin's official website is tonkin.com.au and has social profiles on LinkedIn.

How much revenue does Tonkin generate?

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As of August 2026, Tonkin's annual revenue is estimated to be $50M - $100M.

What is Tonkin's SIC code and NAICS code?

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Tonkin's SIC code is 7299 - Miscellaneous Personal Services, Not Elsewhere Classified and NAICS code is 237 - Heavy and Civil Engineering Construction.

How many employees does Tonkin have currently?

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As of August 2026, Tonkin has approximately 251 employees across 4 continents, including Oceania, Asia and Europe. Key team members include Chief Executive Officer: G. D., Chief Financial Officer: B. M. and Owner: B. T. Explore Tonkin's employee directory with LeadIQ.

What industry does Tonkin belong to?

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Tonkin operates in the Civil Engineering industry.

What technology does Tonkin use?

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Tonkin's tech stack includes Veeam, Microsoft 365, SendGrid, Cisco, Cisco Meraki, Notion, Microsoft Azure and Microsoft Teams.

What is Tonkin's email format?

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Tonkin's email format typically follows the pattern of First.Last@tonkin.com.au. Find more Tonkin email formats with LeadIQ.

When was Tonkin founded?

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Tonkin was founded in 1955.
Tonkin logo

Tonkin

Civil EngineeringSouth Australia, Australia201-500 Employees

Tonkin is a civil engineering and environmental consultancy based in Adelaide, South Australia, that provides services to both private and public sector clients. The firm delivers engineering and advisory solutions across buildings, environmental management, land development, marine and riverine work, transport, waste and water projects. Its client base includes commercial and residential developers, construction firms, municipal councils and government departments.

The company emphasizes curiosity and collaboration, aiming to solve complex problems with thoughtful, sustainable approaches that consider long-term environmental implications and shared stakeholder benefits. It notes that many of its markets are growing rapidly, highlighting the need to accurately forecast future needs in planning and design. Tonkin positions itself as a mid-sized practice that invests in qualified staff and advanced tools to add value beyond the immediate project. In 2018, the firm expanded its national footprint with the acquisition of Sydney's TLB Engineers.

Section iconCompany Overview

Phone number
SIC Code
7299 - Miscellaneous Personal Services, Not Elsewhere Classified
Stock Symbol
8326.HK
NAICS Code
237 - Heavy and Civil Engineering Construction
Founded
1955
Employees
201-500

Section iconFunding & Financials

  • $50M - $100M

    Tonkin's revenue is estimated to be in the range of $50M - $100M

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