WA Limestone is a leading, privately owned quarrying and contracting company in Western Australia, with over 50 years of successful operation. As one of Perth's top suppliers of raw construction materials, we have established ourselves as an industry leader in supplying of limestone products, as well as in quarrying, mining, marine construction, and the manufacturing and delivery of premix concrete. Our team of over 350 dedicated employees and contractors works across metro Perth and regional WA to deliver high-quality solutions to the construction, mining, and civil sectors.

The WA Limestone Group comprises WA Limestone, WA Bluemetal, WA Premix, and the Limestone Building Block Company. We pride ourselves on safety, sustainability, and maintaining strong client relationships. With a family-oriented approach, an approachable management team, a dynamic workforce, and a strong company culture, we offer the job security of a large company while ensuring every employee feels valued.

About the Role

Are you a skilled Plant Mechanic who likes solving problems, working independently and getting home in time to enjoy your own driveway? We’re looking for an experienced Field Service Mechanic to join WA Limestone.

You’ll be supplied with a fully fitted field service truck, work with quality mobile plant and fixed equipment, and be backed by a practical, safety-focused team that knows a good mechanic is worth their weight in grease.

Key Responsibilities

Based at our Bibra Lake workshop, you’ll carry out preventative maintenance, breakdown repairs and major rebuilds across a broad range of mobile and fixed plant.



No two days will be exactly the same — which is ideal if you enjoy a challenge and don’t mind occasionally reminding a machine who’s in charge.

Equipment may include:

- Komatsu excavators, including PC300 to PC1250-8

- Hitachi excavators, including ZX690 and ZX890

- CAT loaders, excavators, trucks and dozers, including 980M, 988H, 320D, 395, 740, 775F, D9 and D11R

- Montabert and Atlas Copco drill rigs

- Jaw, cone and impact crushers, plus screening plants

About you

You’re a capable, reliable and safety-minded Plant Mechanic who takes pride in quality work. You enjoy working independently, contributing to a good team and passing on what you know.

To be successful, you’ll have:

- An Australian-recognised Plant Mechanic Trade Certificate

- Experience working on CAT and Komatsu mining or construction plant

- A current manual driver’s licence; an HR licence is highly regarded

- A strong commitment to protected work practices

- A positive attitude, solid work ethic and interest in a long-term career

- The ability to troubleshoot, repair and maintain a wide range of equipment

- Legal working rights in Australia

- A willingness to mentor and support apprentice and developing mechanics

What’s in it for you?

- Above-industry wages

- A fully equipped field service truck — no need to build one out of spare parts

- Home every night

- Autonomy in the field, with support when you need it

- A strong safety culture and a genuinely supportive team

- Long-term job security with a successful WA-owned company

- The chance to share your knowledge and help train the next generation of mechanics

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📌 Field Service Mechanic (City of Cockburn)
🏢 WA Limestone
📍 City of Cockburn