Fully qualified, fully licensed and available 24/7.
WJC Contracting delivers specialist trades across power generation, mining, gas, agriculture and heavy industry. Every job is scoped, mobilised and executed by qualified tradespeople with fully equipped site vehicles — ready for planned shutdowns, project work and after-hours breakdown response. Our rates are competitive and our standards are not negotiable.
Mechanical Fitting
Expert mechanical fitting for the energy, mining and gas sectors — covering everything from routine maintenance and preventative servicing through to full shutdown scopes and emergency breakdown response.
- Equipment installation, commissioning and shutdown support
- Pump, valve and gearbox rebuilds
- Hydraulic and pneumatic system diagnosis and repair
- Rotating equipment overhauls, laser shaft alignment and balancing
- On-site troubleshooting and breakdown repair
Fully equipped service vehicles and qualified trades enable fast, reliable mobilisation to field jobs and workshop-based work alike.
Fabrication & Welding
- Structural steel fabrication to AS 1554.1
- Pressure welding to AS/NZS 3992:2020 and ISO 9606-1
- Pipe and plate welding qualified across all positions, including overhead and 6G
- Carbon, stainless, and alloy steel materials
- Confined space, elevated and on-site field welding
- Weld traceability, WPS procedures, and third-party inspection
Our pressure welders are qualified and experienced in both workshop and field conditions, including confined space and elevated work environments.
Power Stations
Extensive experience in power generation shutdowns and major maintenance across coal, gas and renewable generation assets — delivered to station standards, permit systems and outage timelines.
- Air heater, furnace and boiler overhauls
- Burner repairs, fit-outs and replacements (coal and gas-fired)
- Duct work fabrication, repair and modification
- Precipitator (pre-sip) overhauls and penthouse recasting
- Magaldi ash conveyor overhauls
- Post-cooler overhauls and expansion joint replacements
- Mill overhauls and ongoing maintenance
- HRSG, gas turbine and steam turbine overhaul support
- Pressure welding on boiler tubes, headers and high-pressure pipework to AS/NZS 3992
- Valve, pump and pipework replacements
- Structural fabrication and steelwork for plant upgrades
Track record with major Queensland generators — mobilised to fit within tight outage windows across coal-fired, gas-fired and combined-cycle plants, as well as adjacent industrial and renewables assets.
Mining
Deep experience across the Queensland coal sector — planned shutdowns, breakdown response and general maintenance on fixed plant and mobile equipment alike.
- Coal breaker stations, wash plants and grizzly fit-outs
- Conveyor systems and coal loading dock maintenance
- Shaker station overhauls and structural refurbishment
- Heavy engineering and boilermaking on trench diggers, pipe layers and dozers
- Dump trucks, front-end loaders, scrapers and excavators
- Dragline bucket repairs and dragline maintenance support
- Structural steel erection and on-site fabrication to engineering drawings
Standard 11 surface mining induction and coal board medical current — ready to mobilise to site with full site inductions and PPE.
Agriculture
Practical, on-farm repair and fabrication for Western Downs producers. From breakdown response in the paddock to purpose-built infrastructure in the workshop.
- Servicing and repair of tractors, planters and general farming machinery
- Cattle crate fabrication, modification and repair
- Cattle grid fabrication and installation
- Construction and installation of irrigation water pump stations
- Custom trailer manufacture, modification and repair
- Steel fencing, gates and general on-farm steelwork
Mobile service across Dalby, Chinchilla, Miles, Roma and the wider Western Downs — fully equipped for field-based repair.
Gas and Pipeline
Specialist pressure welding and pipeline services for the Surat Basin CSG industry and wider gas sector — mobilised at short notice for planned maintenance and remediation.
- Certified pressure welding for steel pipelines to AS/NZS 3992
- Field-based weld remediation and defect repair
- In-situ pipeline welding and tie-in support
- Confined space entry and working-at-heights compliance
- Collaboration with third-party inspection and NDT providers
Qualifications and procedures maintained for high-integrity work, with fast mobilisation across Chinchilla, Miles, Roma and the broader gas fields.
Crane Operation, Dogging & Rigging
In-house lifting capability that integrates cleanly with our fabrication and mechanical scopes — planned, executed and supervised by our own team, so schedules aren't held up waiting on a separate crew.
- Site-specific lift planning — load assessment, load charts, exclusion zones and rescue plans
- Non-slewing mobile crane operation for on-site component handling and installation
- Dual lifts, tandem lifts and complex rigging scenarios
- Structural steel, plant and equipment placement during shutdowns and installations
- Confined-space and elevated rigging supported by full site inductions and PPE
- Fully compliant with WHS and site-specific safety management systems
All personnel hold current tickets and qualifications for the roles they perform — licences and certifications are listed on our About page and available on request.
Labour Hire
Skilled trades and general labour supplied to principal contractors and site teams for shutdowns, project scopes and peak-demand periods across the Western Downs and Queensland's coal, gas and energy sectors.
- Boilermakers, mechanical fitters, dogmen and riggers
- General labourers, trade assistants and site support
- Short-notice mobilisation for shutdowns and breakdowns
- Site-inducted, ticketed and coal board medical current
- Own tooling and PPE — no downtime while kitting out
- Transparent, competitive rate structure
Ideal for principal contractors needing dependable, work-ready personnel that integrate cleanly into an existing site team.
Everything WJC brings to your project — in one PDF.
Services, licences, insurances, safety credentials, welding procedures and the client list — packaged for procurement, tender and pre-qualification submissions.
Ready to price one of these services?
Use our instant quote to price labour, equipment, travel and accommodation from our published rates. It takes a couple of minutes and you get a PDF quote straight away.