What ATC Williams does

ATC Williams is an Australian engineering consultancy founded in 1981 in Melbourne (originally as MPA Williams) that provides specialist technical services across tailings storage facility engineering, water management, and waste and resource recovery for the mining, resources, and government sectors. Its service portfolio spans 13 integrated technical areas—including tailings management, water management, dams engineering, ground engineering, geotechnical investigation, numerical modelling, dam breach analysis, seismic hazards, slurry and mechanical engineering, materials characterisation, closure and rehabilitation, governance and risk assessment, and waste and resource recovery—delivered by 250+ technical staff across 9 offices in Australia (Melbourne, Perth, Brisbane, Singleton, Toowoomba, Hobart, Sunshine Coast, Maroochydore) and Peru (Lima), supported by two specialty laboratories with NATA accreditation and AS/NZS ISO 9001:2016 quality certification.

The firm's core technical differentiators include pioneering work in Central Thickened Discharge (CTD) tailings technology, advanced thickening and filtration design (including filter presses achieving 0.2-0.3 m3 water/tonne versus 3 m3/tonne for unthickened tailings), and integrated multidisciplinary project teams combining TSF designers with hydrologists, seismologists, and environmental specialists. Revenue is generated through project-based professional services engagements delivered directly to enterprise mining clients (including Glencore, BHP, MMG, Evolution Mining, Yancoal, and Peabody), government bodies (such as Sunshine Coast Council since 1998), and resources companies, with multi-year contract cadences that span the full project lifecycle from concept and design through construction, operations, and closure/rehabilitation.

ATC Williams is a privately-held company owned by its founders and principals, with no disclosed external equity or private equity ownership. Growth has been pursued through a combination of organic office expansion (including international entry via Peru in 2014 and Hunter Valley in 2020) and strategic mergers with complementary firms (Allan Watson Associates in 2011 to add waste and water expertise; Hydro Engineering & Consulting in 2021 to build a dedicated water resources business unit). The current leadership team is led by CEO Darren Watt (appointed 2022) with Allan Watson serving as Board Chair through 2025, supported by a newly created Chief Technical Officer role filled by Kim Morrison in July 2025.

Name

ATC Williams

Legal name

ATC Williams Pty Ltd

Website

https://atcwilliams.com

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

51–100 employees

Short description

ATC Williams is an Australian engineering consultancy founded in 1981 that provides specialist tailings, water, and waste management technical services to mining, resources, and government clients across Australia and internationally, employing 250+ staff across 9 offices.

Ownership category

akta.pro rank

Product category

Mining Engineering Consulting

NAICS

Support Activities for Metal Mining (213114), Support Activities for Mining (2131), Other Scientific and Technical Consulting Services (541690), Environmental Consulting Services (54162)

SIC

Services-Testing Laboratories (8734), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Tailings & Water Management Engineering (TSF Design/Construction, Dams, Water Treatment) (IMAKAOAF)

akta.pro secondary industries

Project & Construction Management (EPCM, Owner’s Engineer, Scheduling/Controls) (IMAKAOAG), Health, Safety & Risk Engineering (Process Safety, HAZOP/HAZID, Emergency Systems) (IMAKAOAO)

Keywords

• Mining engineering consulting
• Tailings management services
• Water management engineering
• Waste resource recovery
• Geotechnical engineering services

Headquarters

HQ city

Mordialloc

HQ country

Australia

HQ region

Oceania

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: Project-based engineering consulting services for tailings, water, and waste management across the mining, resources, and government sectors. Services are provided throughout the entire project lifecycle from concept to closure and rehabilitation.
2. Technical Advisory Services: Specialist engineering services including geotechnical investigation, materials characterisation, numerical modelling, dam engineering, and environmental monitoring.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels6 records

Core offering

ATC Williams is an engineering consultancy that provides specialist consulting and technical advisory services across tailings management, water management, and waste and resource recovery for the mining, resources, and government sectors. The firm partners with clients across all stages of the project lifecycle — from site investigation and design through construction support, operational planning, and closure/rehabilitation — and operates 9 offices supported by 2 NATA-accredited specialty laboratories.

Product overview

ATC Williams is an engineering consultancy offering integrated services across tailings, water, and waste management for the mining, resources, and government sectors. The company operates 9 offices globally with 2 specialty laboratories and over 250 staff. Its service offering consists of 13 core technical service areas including Tailings Management, Water Management, Waste & Resource Recovery, Closure & Rehabilitation, Governance & Risk Assessment, Materials Characterisation, Dams Engineering, Slurry & Mechanical Engineering, Ground Engineering, Geotechnical Investigation, Numerical Modelling, Dam Breach Analysis, and Seismic Hazards. These services are delivered through multidisciplinary teams combining geotechnical engineering, hydrology, environmental science, and materials testing capabilities. The company also operates NATA-accredited laboratory facilities for materials characterisation and tailings testing.

Differentiator

Problem solved

Functional benefit

Products and services

• Tailings Management Engineering and design services for tailings storage facilities, covering thickening, filtration, disposal methods, construction support, operational planning, and closure. Targeted at mining operators and resources companies needing safe and sustainable tailings storage.
• Water Management Comprehensive water management services for mining operations, including water balance modelling, hydrological assessments, water conservation, and water accounting frameworks. Targeted at mining and resources clients needing integrated water stewardship.
• Waste & Resource Recovery Waste management consulting including contaminated land assessment, materials engineering, lining systems, landfill site construction, and land remediation. Targeted at mining, resources, and government clients needing integrated waste and resource recovery solutions.
• Closure & Rehabilitation Mine and facility closure planning and rehabilitation services, including engineering design for closure and post-closure phases. Targeted at mine operators needing compliant end-of-life planning and post-closure monitoring.
• Governance & Risk Assessment Risk assessment and governance services for dams and tailings storage facilities, including qualitative risk assessments and Dam Safety Management System (DSMS) implementation. Targeted at mine operators needing independent governance and risk frameworks for dam safety.
• Materials Characterisation Laboratory testing and characterisation of materials including tailings, construction materials, and containment materials. Delivered via NATA-accredited laboratory services across the firm's specialty labs. Targeted at internal project teams and external mining clients.
• Dams Engineering Dam engineering services including design, construction support, operational planning, consequence category assessments, and safety reviews for declared dams. Targeted at mining operators and dam owners needing compliant, safety-reviewed dam designs and ongoing support.
• Slurry & Mechanical Engineering Specialised engineering for slurry pipelines, pumping systems, and mechanical aspects of tailings and water management. Targeted at mining operators needing slurry and pumping system design and integration.
• Ground Engineering Geotechnical and ground engineering services including foundation assessment and earthworks. Targeted at mining and infrastructure projects needing ground stability and earthworks engineering.
• Geotechnical Investigation Site investigation services including drilling supervision, borehole design, permeability testing, and groundwater characterisation. Targeted at mining and infrastructure clients needing rigorous site characterisation prior to design.
• Numerical Modelling Advanced numerical modelling services for complex geotechnical problems, including seepage modelling, groundwater modelling, and tailings storage facility modelling. Targeted at mining clients needing state-of-the-art modelling inputs for design and risk assessment.
• Dam Breach Analysis Dam breach modelling and failure impact assessment services for tailings storage facilities using realistic, innovative, and comprehensive site-specific techniques. Targeted at mining clients needing third-party sign-off and consequence assessments.
• Seismic Hazards Seismological assessment services including Probabilistic Seismic Hazard Analysis (PSHA) for dam and tailings facility design, incorporating latest earthquake catalogues and seismotectonic models. Targeted at mining and resources clients needing seismic hazard inputs for dam design.

Quantifiable outcome

• Retained water volume in unthickened tailings is 3 m3/tonne, compared to conventional thickening which reduces to approximately 1 m3/tonne, and filter presses achieving 0.2-0.3 m3/tonne
• +2 more outcomes

Named customers9 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• Hydro Engineering & Consulting (HEC)coreStrategic or Co-development Partner · 1 October 2021HEC (formerly Gilbert & Associates), led by Tony Marszalek and Dayjil Buhle, joined ATC Williams in October 2021. HEC has provided quality hydrological and water management services to mining and resources industries since 1997. The merger created a formidable water resources business unit, with all six HEC team members joining ATC Williams offices in Brisbane and Bairnsdale.
• Allan Watson Associates (AWA)coreStrategic or Co-development Partner · 1 October 2011Allan Watson Associates (AWA), based in Brisbane with about a dozen staff, merged with ATC in October 2011. AWA brought skills in waste and water that complemented ATC's strength in tailings. The merger expanded ATC's footprint in Eastern Australia and internationally, particularly in South America and the Middle East. Allan Watson became CEO in 2015 and Board Chair from 2022 to 2025.

Scale indicators6 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• GHD: Australian-headquartered multidisciplinary engineering consultancy with significant mining tailings, water, and waste management practices. Direct competitor in Australia for enterprise mining clients and government sector work.
• SLR Consulting: Global environmental and mining consulting firm with overlapping tailings, water, and waste service offerings to mining and resources clients. Closest comparable to ATC Williams in scope and customer overlap, particularly in Australia and the Americas.
• SRK Consulting: Global mining consulting firm specializing in tailings, water, geotechnical, and resource geology. Overlapping service lines and client roster (major and mid-tier miners) make SRK a direct comparable for ATC Williams' specialist mining work.
• Knight Piésold: Specialist mining engineering consultancy focused on tailings storage facility design, water management, and geotechnical services for miners globally. Highly comparable niche focus and customer base to ATC Williams.

Broad incumbents

• WSP: Global engineering giant (now including Golder Associates) with extensive mining, environment, and water practices. Competes with ATC Williams on larger integrated mining tenders but does not specialize in the same way.
• AECOM: Global engineering firm with mining, environment, and water practices serving major resource clients. Larger scale and broader scope than ATC Williams but competes for similar enterprise mining mandates.
• Tetra Tech: Global engineering and consulting firm with strong environmental and water capabilities serving mining clients. Competes with ATC Williams on water management and environmental aspects of mining projects at larger scale.
• Stantec: Global engineering consultancy with mining environmental and water management capabilities. Competes on broader integrated mining and infrastructure mandates; broader portfolio than ATC Williams.
• Worley: Australian-listed engineering services firm with a mining-heavy portfolio and broad EPCM offerings. Overlaps with ATC Williams on tailings and water work but typically delivers larger integrated scopes.

Regional players

• Pells Sullivan Meynink (PSM): Australian specialist geotechnical engineering consultancy with mining exposure. Comparable niche technical focus to ATC Williams but primarily Australia-based and not directly competing in international geographies like South America.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/atc-williams
• Xx.com/atcwilliams
• Facebookfacebook.com/ATC-Williams-293795731398962

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries2 records

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 ATC Williams