What Douglas Partners does

Douglas Partners is a privately held Australian engineering consultancy specializing in geotechnical, environmental, and groundwater services. Founded in 1963 as Ground Test Australia by Don Douglas (who had worked in geotechnical drilling since 1960), the company was reincorporated in 1983 as D.J. Douglas & Partners Pty Ltd. The firm operates across Australia and Papua New Guinea with 600+ employees distributed across 19-20 offices and 14 NATA-accredited laboratories. Its six integrated service lines are Geotechnical Investigation, Environmental Consulting, Groundwater Consulting, Rock Mechanics, Geophysics, and Materials Testing, delivered to clients in construction, mining, transport, defence, water, energy (including renewables), property, and land development sectors.

The company's technical platform combines field investigation, laboratory testing, and computational analysis using industry-standard methods including AS 1726:2017, MODFLOW/FEFLOW for groundwater modelling, and Leapfrog Geo for 3D visualization. Proprietary tools include Core-GS for borehole logging and Douglas Map for data centralization across projects. GIS systems integrate subsurface data across 130,000+ completed projects. The firm holds ISO 45001 and ISO 14001 certifications across all branches.

Revenue is generated through project-based professional services fees across consulting engagements and laboratory testing, with quote-based pricing tied to project scope. Sales-led go-to-market relies on direct client relationships and long-standing reputation, supported by consistent Financial Review Client Choice Awards recognition every year since 2008. Growth has been achieved through organic office expansion (19 offices opened progressively since 1963) and selective bolt-on acquisitions including SoilMech (1989) and Chandler Morrison Geotechnical (2015, forming Douglas CMG).

Name

Douglas Partners

Legal name

Douglas Partners

Website

https://douglaspartners.com.au

Company type

Private

Founded year

1963

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Douglas Partners is a privately held Australian engineering consultancy delivering geotechnical, environmental, groundwater, rock mechanics, geophysics, and materials testing services through 20 offices, 14 NATA-accredited labs, and 600+ staff across Australia and Papua New Guinea.

Ownership category

akta.pro rank

Product category

Geotechnical Engineering Consulting

NAICS

Environmental Consulting Services (54162), Geophysical Surveying and Mapping Services (541360)

SIC

Services-Engineering Services (8711), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB)

Keywords

• Geotechnical engineering consulting
• Environmental site assessment
• Construction materials testing
• Groundwater consulting services
• Rock mechanics engineering

Headquarters

HQ city

Sydney

HQ country

Australia

HQ region

Oceania

Offices17 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Geotechnical Consulting Services: Professional consulting services for geotechnical investigation, analysis, and design. Revenue generated through project-based fees for site investigations, laboratory testing, technical reporting, and ongoing project support.
2. Environmental Consulting Services: Environmental assessment, contaminated land management, and remediation services. Project-based consulting fees for site investigations, risk assessments, and environmental auditing.
3. Materials Testing Services: Construction materials testing services including compaction testing, soil testing, aggregate testing, concrete testing, and rock testing. Laboratory testing fees and field testing services.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Douglas Partners is an Australian geotechnical engineering consultancy that delivers integrated ground investigation, analysis, and design services across six disciplines: geotechnical engineering, environmental consulting, groundwater, rock mechanics, geophysics, and construction materials testing. Services are delivered project-by-project through 20 offices and 14 NATA-accredited laboratories nationwide, supported by proprietary tools such as Core-GS for borehole logging and Douglas Map for data centralisation. The firm has completed over 130,000 projects across Australia and Papua New Guinea since its founding in the early 1960s.

Product overview

Douglas Partners is a geotechnical engineering consultancy offering an integrated suite of specialist services. The core portfolio consists of six service lines: Geotechnical Investigation Services (covering foundation design, earthworks, pavements, offshore structures, mining geotechnics, and renewable energy projects), Environmental Consulting Services (contaminated land, waste, landfill, and occupational hygiene), Groundwater Consulting Services (investigations, monitoring, modelling, and dewatering), Rock Mechanics Services (for mining and civil engineering), Geophysics Services (seismic, GPR, resistivity, vibration monitoring), and Materials Testing Services (NATA-accredited soils, rocks, aggregates, and concrete testing across 14 laboratories). These services are delivered through 19 offices and 14 NATA-accredited laboratories nationwide, supported by proprietary data management tools including Core-GS for borehole logging and Douglas Map for data centralisation, enabling integrated practical solutions across geotechnics, environment, groundwater, and rock mechanics disciplines.

Differentiator

Problem solved

Functional benefit

Brands

• Douglas CMG: Geotechnical consulting operations formed following the acquisition of Chandler Morrison Geotechnical in Coffs Harbour and Port Macquarie in 2015.

Products and services

• Geotechnical Investigation Services Comprehensive geotechnical investigation, analysis, and design services spanning foundation design, retaining structures, slope stability, earthworks, pavement design, offshore geomechanics, mining geotechnics, and renewable energy developments for industrial, commercial, residential, and infrastructure projects across Australia.
• Environmental Consulting Services Environmental consulting covering contaminated land management, waste management, salinity and acid sulfate soils assessment, landfill services, marine dredging studies, occupational hygiene, and environmental auditing for projects across Australia.
• Groundwater Consulting Services Groundwater consulting encompassing investigations, monitoring, conceptual and numerical modelling, dewatering, contamination assessment, and impact assessment for development and infrastructure projects.
• Rock Mechanics Services Rock mechanics services for mining and civil engineering sectors, covering underground excavations, slope stability, subsidence, 2D and 3D modelling, and ground support design across Australia and Papua New Guinea.
• Geophysics Services Geophysical consulting including seismic surveys, vibration monitoring, electrical resistivity imaging, ground penetrating radar, and ground conductivity mapping for geotechnical, environmental, and groundwater investigations.
• Materials Testing Services NATA-accredited construction materials testing for soils, rocks, aggregates, and concrete, including compaction testing, CBR, triaxial testing, aggregate testing, and concrete testing across industrial, commercial, residential, mining, and infrastructure projects.

Quantifiable outcome

• Over 130,000 projects delivered successfully across Australia and Papua New Guinea
• +3 more outcomes

Named customers7 records

Segments12 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability5 records

Feature6 records

Partnerships

Two partnerships are on record, tiered minor.

• ARC Centre of Excellence for Geotechnical Science and EngineeringminorStrategic or Co-development PartnerDouglas Partners is an industry sponsor of the ARC Centre of Excellence for Geotechnical Science and Engineering, supporting academic research and development in the geotechnical field.
• Australian UniversitiesminorStrategic or Co-development PartnerDouglas Partners provides pro-bono lectures for undergraduate studies at universities, supporting education in geotechnical and environmental engineering disciplines.

Scale indicators6 records

Recent moves25 records

Expansion highlights5 records

Direct peers

• Coffey International (a Tetra Tech company): Australia's largest dedicated geotechnical and environmental engineering consultancy, historically DP's closest direct competitor across construction, mining and infrastructure. Acquired by Tetra Tech in 2019, the combined business competes head-to-head with DP on geotechnical, environmental and materials testing mandates across Australia and PNG.
• GHD Group: Australian employee-owned engineering, environmental and construction services consultancy with similar multi-disciplinary offering and comparable geographic footprint. Competes with DP directly on transport, water, resources and property engagements across Australia.
• Aurecon: Australia- and Asia-Pacific focused engineering and infrastructure advisory with overlapping capabilities in geotechnical, environmental and advisory work. Often short-listed alongside DP on major public infrastructure and mining projects.
• SMEC (a Surbana Jurong company): Australian-headquartered engineering consultancy with strong transport, water and resources sector presence. Direct competitor on infrastructure geotechnical and environmental investigations, particularly in regional Australia and PNG.
• BG&E: Australian engineering consultancy delivering civil, structural, geotechnical and environmental services. Directly comparable in size, multi-disciplinary mix and client base across transport, property and resources projects.

Broad incumbents

• WSP Australia: Global professional services firm with substantial Australian practice spanning property, transport, environment and resources. After its Golder Associates acquisition, WSP competes directly with DP on mining geotechnics, contaminated land and large infrastructure programs.
• Jacobs Australia: Global engineering and professional services group with significant Australian operations across transport, water, environment and defence. Competes with DP on major government tenders and large mining/energy mandates.
• Stantec Australia: International engineering consultancy with an Australian footprint expanded through the Cardno acquisition. Competes with DP in environmental consulting, water infrastructure and urban development.
• Mott MacDonald: Global engineering, management and development consultancy with Australian operations across transport, water, energy and environment. Competes with DP on major infrastructure programs and contaminated land / environmental mandates.

Regional players

• Tonkin + Taylor: New Zealand-headquartered specialist environmental and geotechnical engineering consultancy with established Australia presence. Highly comparable technical offerings (geotechnical, environmental, groundwater, materials testing) though primarily focused on the trans-Tasman and Pacific markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/DouglasPartner1
• Facebookfacebook.com/DouglasPartnersHQ

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Douglas Partners