Monadelphous Group Limited is an Australian-based engineering services company that provides construction, maintenance and industrial services to the resources, energy and infrastructure sectors. Headquartered in Perth, Western Australia, Monadelphous operates a network of workshops, offices and remote project sites, delivering integrated solutions from initial feasibility studies through to project completion and ongoing asset management.
The company’s core offerings encompass mechanical, piping and structural installation, electrical and instrumentation, project management, shutdown and turnaround services, as well as facilities management. These services are tailored to support clients in the mining, oil and gas, renewable energy, petrochemical and general industrial markets. Monadelphous’s in-house capabilities include advanced fabrication, specialist concreting, heavy lifts and piling, underpinned by rigorous safety and quality systems.
Founded in 1972, Monadelphous has grown through organic expansion and strategic acquisitions to become a leading service provider in its fields. While its primary operations are concentrated across Australia—particularly in Western Australia and Queensland—the company also undertakes projects in Papua New Guinea, New Zealand and parts of Southeast Asia. Monadelphous is publicly traded on the Australian Securities Exchange and maintains an American depositary receipt program under the ticker MOPHY on the OTC Markets in the United States.
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