What WGA does

Wallbridge Gilbert Aztec (WGA) is an Australian and New Zealand engineering and project management consultancy with more than 800 professionals, founded in 1989 and headquartered in Adelaide, Australia. The firm delivers infrastructure consulting services across five priority verticals: transportation, water, power and renewables, ports and marine, and defence-related infrastructure, serving government agencies and private-sector clients across both countries. WGA's business model is project-based professional services, monetized through engineering and project management engagements tied to multi-year public and private infrastructure programs.

On April 21, 2026, AtkinsRéalis Group Inc. announced that it had entered into a scheme implementation deed to acquire WGA via a scheme of arrangement under the Australian Corporations Act, subject to WGA shareholder approval and regulatory and court approvals. The transaction is positioned by the acquirer as expanding its ANZ delivery capacity and sector depth in priority infrastructure markets. Upon close, WGA will operate as part of AtkinsRéalis's global engineering services platform, with the combined entity inheriting WGA's established ANZ client footprint and 800+ professional workforce.

Name

WGA

Legal name

Wallbridge Gilbert Aztec

Website

https://wga.com.au/

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

251–500 employees

Short description

Wallbridge Gilbert Aztec (WGA) is an Australian and New Zealand engineering and project management consultancy with 800+ professionals delivering transportation, water, power and renewables, ports and marine, and defence infrastructure services to government and private clients across the region.

Ownership category

akta.pro rank

Product category

Engineering & Project Management Consultancy

NAICS

Architectural, Engineering, and Related Services (5413), Power and Communication Line and Related Structures Construction (237130)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Wastewater Treatment Plant Construction (WWTP) (IMAFAGAB)

akta.pro secondary industry

Municipal Wastewater Treatment Plants (WWTPs) (EUANADAA)

Keywords

• Engineering consultancy
• Project management services
• Infrastructure consulting
• Transport engineering
• Defence infrastructure

Headquarters

HQ city

Adelaide

HQ country

Australia

HQ region

Oceania

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Core offering

WGA is an Australian and New Zealand engineering and project management consultancy with more than 800 professionals. It delivers multi-disciplinary engineering services and program/project management for infrastructure clients across transportation, water, power and renewables, ports and marine, and defence-related infrastructure in Australia and New Zealand.

Differentiator

Problem solved

Functional benefit

Products and services

• Engineering Consultancy Services Multi-disciplinary engineering services covering transportation, water, power and renewables, ports and marine, and defence-related infrastructure across Australia and New Zealand. Services include planning, design, technical advisory, and engineering support for government agencies and private infrastructure owners.
• Project Management Services Full-lifecycle program and project management for major infrastructure assets, including delivery oversight, procurement support, and program controls. Delivered to government and private clients across Australia and New Zealand.

Quantifiable outcome

• 90.38% member approval on contract ratification (4,282 votes)
• +2 more outcomes

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• AMPTP (Alliance of Motion Picture and Television Producers)flagshipOthers · 24 April 2026WGA ratified a new 4-year contract with AMPTP covering residuals, AI safeguards, minimum rate increases, and $321 million in healthcare contributions. The agreement sets industry standards for writer compensation and working conditions.

Scale indicators7 records

Recent moves3 records

Expansion highlights4 records

Direct peers

• GHD: Australian-headquartered engineering, architecture, and project management consultancy of comparable scale operating across transportation, water, energy, and defence in ANZ — a direct competitor for WGA's priority markets.
• Aurecon: ANZ-headquartered engineering and infrastructure advisory firm with overlapping service lines in transport, water, energy, and defence — competing head-to-head with WGA for government and private infrastructure mandates.
• WSP Global: Global engineering consultancy with a strong ANZ presence serving transportation, water, power, and property markets — directly comparable in service mix and client base to WGA.
• AECOM: Global infrastructure consulting firm with established ANZ operations spanning transport, water, environment, and energy — directly competes for the same large-scale ANZ infrastructure programs as WGA.
• Stantec: Global engineering, architecture, and environmental consulting firm with ANZ operations focused on water, infrastructure, and energy — overlapping with WGA's priority sectors.
• Jacobs Solutions: Global professional services firm delivering engineering, technical, and project management solutions in ANZ water, transport, defence, and advanced facilities — comparable in capability and client set.
• SMEC (Surbana Jurong): ANZ-originated engineering consultancy (now part of Surbana Jurong) operating across transport, water, and energy — a closely comparable ANZ-rooted infrastructure consulting peer.
• Mott MacDonald: Global engineering, management, and development consultancy with ANZ infrastructure advisory work — comparable in service offering and end markets to WGA.
• Arcadis: Global design, engineering, and consultancy firm active in ANZ water, transport, and energy infrastructure — comparable in scope and target clients.

Broad incumbents

• KBR: Global engineering and government services firm with ANZ infrastructure and defence capability — a broader incumbent whose government services and sustainable technology solutions overlap with WGA's priority sectors.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks4 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

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 WGA