Mobile Heavy Diesel Mechanics at Roy Hill Iron Ore.

Service Requirements at Roy Hill Iron Ore

Sustaining throughput across a 6 Mtpa iron ore operation places relentless cyclic load on haul truck drivetrains, ancillary mobile plant, and support equipment — load profiles that compress standard OEM service intervals and elevate unplanned failure risk across the fleet. Roy Hill Holdings Pty Ltd operates across BIF and channel iron deposit (CID) geology in the Nullagine district of the Pilbara, where abrasive iron ore fines accelerate wear on fuel systems, air filtration assemblies, and cooling circuits. Mobile Heavy Diesel Mechanics engaged at this site must be configured for field-based diagnostics, component exchange, and preventive maintenance execution on large-format mining equipment operating continuously in a producing mine environment. Contractors must demonstrate prior exposure to comparable Pilbara iron ore operations, with documented Mean Time To Repair (MTTR) evidence from equivalent fleet types. Scope documentation should specify maximum unplanned-downtime response time from call receipt to on-machine intervention as a minimum performance threshold.

• Ambient temperature capability: Demonstrated service delivery in sustained ambient conditions of 45°C, with tooling, diagnostic equipment, and consumables rated to peak exposure of 48°C — minimum 24 months of verified Pilbara field service within the last 5 years, evidenced by site reference letters or equivalent documentation.
• MTTR compliance threshold: Documented Mean Time To Repair of ≤4 hours for Category 1 unplanned breakdowns on haul trucks or primary mobile plant, drawn from a minimum of two comparable iron ore mine sites, submitted as part of tender response with supporting field service logs.
• Fleet coverage scope: Demonstrated OEM-authorised or OEM-trained capability across a minimum of two heavy equipment platforms common to large-scale iron ore operations (e.g. Caterpillar 793/797, Komatsu 830E/930E class), with technician-level certification documentation submitted per individual mobilised to site.

Site-Specific Operational Constraints

Conditions procurement must communicate to all bidders in tender documentation for Roy Hill Iron Ore.

• Environment: Pilbara conditions impose sustained summer ambient temperatures of 45°C and peak exposures to 48°C, combined with pervasive iron ore fines that compromise air filtration and fuel system integrity. Wet season rainfall events (November–April) can restrict haul road access and require contractors to maintain weatherproof field service capability without reliance on fixed workshop infrastructure.
• Logistics: The mine sits approximately 1,129 km from Perth, with Newman (~102 km) serving as the nearest serviceable hub for parts staging, technician mobilisation, and emergency component sourcing. Tender documentation must specify that contractors maintain a pre-positioned critical-parts inventory at Newman or equivalent proximate location to meet SLA commitments — air freight from Perth cannot be the primary contingency for unplanned breakdown response.
• Response SLA: Emergency call-out response must achieve on-site attendance within 2–4 hours for breakdowns occurring within the mine's operational footprint; extended mobilisation from Newman hub must not exceed 12–24 hours. SLA non-compliance must be captured in KPI-linked contract terms with defined financial penalty provisions per incident.
• Roster: FIFO roster compatibility is mandatory, with shift patterns aligned to the mine's operational schedule. Contractors must demonstrate standby crew availability to maintain SLA coverage across both day and night shifts without reliance on single-technician deployment.
• Camp/facilities: Tender documentation must clarify site-provided versus contractor-provided accommodation arrangements. Where site camp access is granted, contractors remain responsible for FIFO logistics from Newman or Port Hedland. Self-sufficient camp capability must be declared if contractors intend to operate from an independent facility.

Contractor Capability Checklist

Minimum evaluation criteria for shortlisting Mobile Heavy Diesel Mechanics contractors at Roy Hill Iron Ore. Each criterion must be verifiable via documentation submitted with tender response.

• Technical certifications: OEM-issued authorisation or OEM-recognised training certification for each heavy equipment platform within the proposed scope; AS 2790 (earthmoving machinery) awareness compliance where applicable; MARCSTA site safety induction card or equivalent Pilbara mine site entry credential for all mobilised personnel.
• Personnel tickets: Current WA Mechanical Trade Certificate (or equivalent national recognition) for all field technicians; High Voltage Awareness where hybrid or electrically-assisted drivetrain components are within scope; First Aid Certificate (minimum Level 2) per technician deployed to remote site locations.
• Mobilisation SLA: Documented evidence of achieving ≤4-hour on-site response from call receipt at a minimum of one comparable Pilbara iron ore or bulk minerals operation within the last 3 years — field service logs or client-signed performance reports accepted.
• Public Liability insurance: Minimum AUD $20M per occurrence (Certificate of Currency required with tender response — must name Roy Hill Iron Ore site scope).
• Professional Indemnity: Minimum AUD $10M aggregate where the contractor's scope includes technical specification of replacement components, maintenance programme design, or engineering-level diagnostic advice.
• Workers Compensation: Full statutory cover under WA law (WorkCover WA — Injury Management Plan required, submitted with prequalification documentation).
• Site exposure: Minimum 3 years of continuous mobile heavy diesel maintenance at an operating open-cut iron ore or comparable hard-rock bulk minerals mine; CID or BIF geology exposure preferred and must be declared in capability statement.
• Safety systems: Documented HSE management system certified to ISO 45001 or equivalent; demonstrated ICAM (Incident Cause Analysis Method) investigation capability required, given the remote site context and regulatory expectations under WA mining safety legislation.

Regulatory & HSE Framework

All mobile heavy diesel maintenance activities at Roy Hill Iron Ore are governed by the Work Health and Safety Act 2020 (WA) and the Work Health and Safety (Mines) Regulations 2022 (WA), administered by WorkSafe WA. In the context of mobile plant maintenance, these regulations impose specific obligations around isolation and lockout/tagout procedures, plant registration, and competency verification for persons performing work on registered mining equipment — requirements that must be explicitly addressed in contractor HSE plans submitted at tender stage. Supplier registration is managed through the Avetta platform via the Roy Hill Supplier Portal (Avetta: https://www.avetta.com/); portal registration is mandatory prior to RFQ participation, and prequalification status must be current at the time of tender submission. All contractors must complete site-specific induction via Roy Hill Holdings Pty Ltd procedures before mobilisation, with induction records retained and available for audit throughout the contract term.

Sourcing Qualified Contractors

No confirmed tender activity for this specific service category has been identified in publicly available procurement records at the time of this briefing. The regional labour pool for Mobile Heavy Diesel Mechanics in the Pilbara is estimated at approximately 3–5 active providers with genuine large-format mining fleet capability, centred on Newman (~102 km from site) and extending to Port Hedland. This is a constrained market relative to the SLA demands of a continuously producing iron ore operation, and procurement lead times must reflect that reality. Contractors with confirmed regional exposure include SHIFT Diesel and Earth, Marlee Resources, and Everything Diesel (noted as market reference only, not endorsement). Procurement teams engaging this market must allow a minimum of 6–8 weeks for prequalification, Avetta portal onboarding, and site induction processing before first mobilisation can be achieved — compressing this timeline risks non-compliant contractor deployment against the SLA framework specified in the RFQ.