Monadelphous Group

What Monadelphous Group does

Monadelphous Group Limited is an ASX-listed Australian engineering, construction, and maintenance services provider headquartered in Victoria Park, Western Australia, founded in 1972. The group operates through two integrated divisions—Engineering Construction and Maintenance Services—delivering multidisciplinary engineering, procurement, and construction (EPC), structural, mechanical, piping (SMP), electrical and instrumentation works, and ongoing maintenance, shutdown, and turnaround services for fixed industrial plants. Its customer base is concentrated among major Australian resource and energy producers including BHP Group Ltd, Rio Tinto Ltd, Woodside Energy, Santos, INPEX, Shell Australia, Albemarle Lithium, Talison Lithium, Liontown Resources, and CS Energy, with operational concentration in Western Australia's Pilbara region, Queensland's LNG sector, Papua New Guinea, and New Zealand.

The company generates revenue through two primary streams: one-time EPC and construction contracts on major projects (revenue recognized over project lifecycle) and recurring maintenance and shutdown services delivered under multi-year framework agreements, with maintenance representing the majority of recurring annual turnover. Pricing is contract- and project-based, negotiated directly with enterprise clients on scope, duration, and complexity, with no publicly disclosed product tiers. The go-to-market motion is enterprise field sales, securing large contracts directly with major resource and energy producers through long-standing relationships. The portfolio includes wholly-owned subsidiaries Melchor Contracting (structural concrete), BMC (mechanical and electrical), High Energy Service (HES, high voltage), Kerman Contracting, and Arc West (protective coatings), as well as joint ventures Mondium (60% with Lycopodium for minerals processing EPC) and Zenviron (wind farm balance-of-plant with ZEM Energy and Vestas).

Strategically, Monadelphous has pursued capability expansion through targeted acquisitions—completing four acquisitions between 2023 and 2025 across structural concrete, mechanical/electrical services, high voltage, and general construction—while exiting non-core international operations (Buildtek SpA ceased operations March 2023). FY24 revenue of approximately $2.03 billion AUD (up 11% YoY) accelerated to $1.53 billion in H1 FY2026 (up 45.6% YoY), with H1 NPAT up 52.6% to $64.9 million. The group has secured approximately $1.4 billion in new contracts since the start of FY2026, building a contracted portfolio of approximately $3.7 billion, with management guiding to FY2026 revenue approximately 30% above the prior year (implying roughly $1.8-1.9 billion AUD on the FY25 base).

Name

Monadelphous Group

Legal name

Monadelphous Group Limited

Website

https://monadelphous.com.au

Company type

Public

Founded year

1972

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Monadelphous Group is an ASX-listed Australian engineering contractor providing multidisciplinary construction, EPC, and recurring maintenance services to major resource and energy producers including BHP, Rio Tinto, and Woodside, primarily across Western Australia and Queensland.

Ownership category

akta.pro rank

Product category

Industrial Engineering, Construction and Maintenance Services

NAICS

Engineering Services (541330), Architectural, Engineering, and Related Services (5413)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), Services-Engineering Services (8711)

akta.pro primary industry

Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ)

akta.pro secondary industries

Civil & Site Works EPC (Earthworks, Roads, Drainage, Foundations) (EUAEADAA), Wind Power Plant EPC (Onshore/Offshore) (EUAEAAAF), Mineral Processing Plant Design & EPCM (Flowsheet Development, Piloting & Scale-up) (IMAKALAK), Wind Balance-of-Plant EPC (Crane Pads, Turbine Foundations, Internal Roads) (EUAEADAI)

Keywords

• Engineering construction services
• Industrial maintenance services
• Mining infrastructure contracting
• Shutdown turnaround services
• Resources sector EPC

Headquarters

HQ city

Victoria Park

HQ country

Australia

HQ region

Oceania

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales, Others

Revenue model

1. Engineering Construction: Provides engineering, procurement, and construction services for major projects in resources, energy, and infrastructure sectors. Revenue recognized over project lifecycle.
2. Maintenance Services: Long-term maintenance and shutdown services under framework agreements. Recurring revenue comprising over half of annual turnover.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Monadelphous Group is an ASX-listed Australian engineering company that delivers engineering, procurement and construction (EPC) services, ongoing maintenance, and shutdown and turnaround support to the resources, energy and infrastructure sectors. The company operates through two main divisions — Engineering Construction and Maintenance and Industrial Services — and supplements this with joint ventures and subsidiaries in modular fabrication, renewable energy construction, electrical and instrumentation, access services and non-destructive testing.

Product overview

Monadelphous Group operates as a unified engineering services provider organized around two core divisions: Engineering Construction and Maintenance. The company offers multidisciplinary construction services (structural, mechanical, piping, electrical and instrumentation), long-term maintenance and shutdown services, and specialized access solutions including IRATA-certified rope access. The portfolio includes subsidiary and joint venture brands: Mondium (60%-owned EPC joint venture with Lycopodium for minerals processing) and Zenviron (renewable energy joint venture with ZEM Energy for wind farm balance-of-plant). The company has expanded through acquisitions including Arc West (protective coatings), Melchor Contracting (structural concrete), BMC (mechanical and electrical services in Victoria), and High Energy Service (high voltage services in Perth). Major service lines span rail maintenance, heavy lift operations, industrial coatings, and maintenance contracts for LNG, mining, and energy infrastructure.

Differentiator

Problem solved

Functional benefit

Brands

• Mondium: Engineering, procurement and construction joint venture with Lycopodium targeting minerals processing sector projects
• Zenviron

Products and services

• Engineering Construction Services Multi-discipline engineering, procurement and construction (EPC) services for new processing plants, non-process infrastructure and supporting facilities, delivered primarily to tier-one resource and energy customers across Australia.
• Maintenance and Industrial Services Ongoing maintenance, shutdowns, turnarounds and sustaining capital works for operating mines, LNG facilities, processing plants and other industrial assets, typically delivered under long-term framework agreements.
• Modular Fabrication (Mondium) Modular construction and off-site fabrication services delivered through the Mondium joint venture, providing process plant modules and structural assemblies to the Australian resources sector.
• Renewable Energy Construction (Zenviron) Engineering, procurement and construction of balance-of-plant works for utility-scale wind, solar and battery storage projects, delivered through the Zenviron joint venture with ZEM Energy.
• Electrical and Instrumentation Services (HES) Specialist electrical, instrumentation and control systems installation, maintenance and commissioning services for resource, energy and infrastructure customers, delivered through the HES subsidiary.
• Access and Painting Services (Arc West) Specialist rope access, scaffolding, industrial painting, insulation and surface treatment services for hard-to-reach structures across the resources, energy and infrastructure sectors, delivered through Arc West.

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered minor and core.

• Jacobs Engineering Group Inc.minorStrategic or Co-development Partner · 1 February 2017Monadelphous Jacobs JV received letter of intent from Oil Search for EPC services on oil and gas production facilities in Papua New Guinea, valued at approximately US$50 million per annum.
• ZEM Energy (via Zenviron joint venture)coreStrategic or Co-development Partner · 1 December 2016Zenviron is a joint venture with ZEM Energy to deliver wind farm projects. Consortium with Vestas for wind farm delivery. Monadelphous' renewable energy joint venture targeting balance-of-plant works for wind farms.
• Lycopodium LtdcoreStrategic or Co-development Partner · 1 October 2016Monadelphous formed incorporated joint venture MONDIUM with Lycopodium to target and deliver EPC projects in the minerals processing sector. Monadelphous holds 60% share. Brings together Monadelphous' multidisciplinary engineering and construction capabilities with Lycopodium's technical expertise and minerals project delivery experience.
• Giovenco Industries (Aust) Pty Ltd / StorkminorStrategic or Co-development Partner · 1 December 2015MGJV is a 70:30 joint venture between Monadelphous and Giovenco Industries (Aust) Pty Ltd (a Stork company) for Woodside-operated Karratha Gas Plant Life Extension Program.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• NRW Holdings: ASX-listed Australian mining and infrastructure contractor providing civil construction, contract mining, and maintenance services to resources clients including iron ore and lithium producers. Directly comparable as a Pilbara-focused EPCM/maintenance peer with similar customer roster.
• Macmahon Holdings: Australian mining services contractor specializing in surface and underground mining, civil construction, and maintenance. Comparable customer overlap with major gold and base metal miners and a similar mix of project and recurring maintenance work.
• CIMIC Group: Australia's largest construction and mining services group (parent of Sedgman and Thiess). Comparable as a diversified EPC/maintenance contractor serving resources and infrastructure with minerals processing capability via Sedgman that overlaps with Monadelphous's Mondium JV.
• Downer EDI: ASX-listed integrated services provider with engineering, construction, and maintenance across resources, energy, transport, and utilities. Direct overlap in maintenance services and infrastructure construction in Australia.
• Worley (WorleyParsons): Global engineering and project delivery firm focused on energy, chemicals, and resources. Comparable in LNG/maintenance services to LNG operators (Woodside, Shell, INPEX) and energy transition projects that overlap Monadelphous's portfolio.
• Lycopodium: ASX-listed engineering and project management firm specializing in minerals processing EPC delivery. Direct peer through Monadelphous's 60%-owned Mondium JV; competes for and delivers complementary minerals processing projects globally.
• Service Stream: ASX-listed provider of essential network services including design, construction, maintenance, and asset management across utilities and infrastructure. Comparable in maintenance services delivery and infrastructure project execution in Australia.
• Sedgman: CIMIC-owned minerals processing EPC contractor with global operations in coal, iron ore, copper, and battery materials. Direct competitor to Monadelphous's Mondium JV in the minerals processing EPC space.
• Clough Limited: Australian engineering and construction firm delivering EPC and maintenance for energy, mining, and infrastructure. Direct peer in LNG/energy EPCM with similar customer base (e.g., INPEX Ichthys); now part of Webuild group.

Broad incumbents

• AtkinsRéalis (formerly SNC-Lavalin): Global professional services and project management firm with nuclear, engineering, and infrastructure capabilities including LNG and mining. Larger incumbent with overlapping capabilities but broader industry portfolio.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries7 records

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about Monadelphous Group