About Us

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Mibus Bros (Aust) Pty Ltd is a quality civil works, earthmoving and oversize/overmass contractor based in Portland, Victoria. We predominantly service the South East of South Australia and Western Victoria area, known as “The Green Triangle”, but also extend to Broken Hill, Shepparton, Geelong and beyond.

Established in 1974, Mibus Bros is a third-generation family business controlled by the principals, Martin, Andrew and Lewis Mibus, who themselves contribute over 140 years of combined experience.

We provide a range of earthmoving and civil contracting services to individuals, companies, local councils, developers and other contractors. This includes State and Federally funded projects as a Major Road Projects Panel 6 – Medium Works Contractor, (Barwon South West) member and certified under the Federal Safety Certified (FSC) Work Health and Safety Accreditation Scheme.  We pride ourselves on providing excellent customer service, delivering cost-effective solutions to meet client needs and maintaining long-term relationships for mutual benefit.

Our people and equipment are supported by accredited management systems that are independently audited to conform to the requirements of the International Management Standards 9001 Quality Management Systems & 14001 Environmental Management Systems and ISO 45001 Occupational Health & Safety Management Systems.

With our in-house fleet of trucks and earthmoving equipment, we can ensure prompt and reliable delivery of services to clients and project sites.

We are prequalified contractor under the Austroads National Prequalification system for Civil (Road and Bridge) Construction Contracts – Road Category R2; Bridge Category B2 & Financial Level F15 and Traffic Management Services.


Board of Directors

Martin Mibus
Andrew Mibus


Management Team

John Weichert – General Manager
Robbie Malseed – Operations Manager
Mark Chivers – Finance Manager