Osmose acquires WA's Mainswest
Wednesday, 04 February, 2026
Through its Australian subsidiaries, multinational business Osmose Utilities Services has acquired the Western Australian company Mainswest, a civil and electrical contracting organisation specialising in the construction and maintenance of underground utilities.
Osmose has also acquired the assets of Centillion Solutions, an Australian company supplying engineering design services for the telecommunications industry.
Mainswest delivers high- and low-voltage electrical services, fibre network installations, horizontal directional drilling, pit and pipe works, substation maintenance and electrical testing services across the energy, utilities, telecommunications, mining and construction sectors.
Centillion provides fibreoptic engineering, design, drafting and geospatial services for Fibre-to-the-X (FTTX) and Hybrid Fibre Coax Networks.
“This step strengthens our ability to support a more resilient, reliable and modern electric and telecom grid,” said Mike Adams, CEO of Osmose.
“By combining our capabilities with these leading companies, we are better positioned to help utilities meet evolving infrastructure demands while maintaining safe and dependable service for their customers.”
Osmose, which was founded in North America in 1934, expanded its operations to Australia and New Zealand in 2018. With Osmose Australia headquartered in Perth, these latest acquisitions are intended to expand the company’s local service offerings to include technical and underground services, along with comprehensive, turnkey solutions for Australian customers across utility and local government networks.
“The addition of Mainswest and Centillion meaningfully enhances our local capability across underground, electrical and telecommunications services, allowing us to deliver more integrated solutions to Australian customers,” said Mike Kemp, Managing Director of Osmose Australia.
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