Mobile Heavy Diesel Mechanics at Brockman.

Service Requirements at Brockman

Sustaining 34 Mtpa iron ore throughput across open pit benches in the Brockman Syncline places cyclic, high-load demand on haul truck drivetrains, ancillary plant, and support fleet that routinely exceeds standard OEM service intervals. Rio Tinto / Hamersley Iron Pty Ltd operates Brockman as an active open cut iron ore operation in the West Pilbara Mineral Field, and the mobile heavy diesel scope must be sized for continuous production support — not periodic call-out. Fleet composition at comparable BIF-hosted hematite operations typically spans 200-tonne-class haul trucks, graders, dozers, and conveyor drive units, all of which require field-serviceable diesel mechanics with OEM-level diagnostic capability deployed to the point of failure on unpaved haul roads. Contractors must demonstrate predictive-maintenance integration credentials — specifically, evidence of telematics-linked condition monitoring (VIMS, KOMTRAX, or equivalent OEM platform) used to schedule interventions before unplanned downtime events. Scope documentation should specify maximum unplanned downtime per major drivetrain failure event as a minimum performance threshold.

• Ambient heat rating: All field technicians, tooling, and diagnostic equipment must be rated and operationally demonstrated for sustained ambient temperatures of 45°C, with documented evidence of service delivery at peak conditions reaching 48°C — minimum 24 months of comparable Pilbara site exposure within the last 5 years required.
• Predictive maintenance integration: Contractors must provide documented evidence of active telematics-linked condition monitoring participation (VIMS, KOMTRAX, or OEM-equivalent platform) at a comparable open pit iron ore operation within the last 3 years, including at least one pre-agreed planned maintenance window executed against condition-based triggers rather than calendar intervals.
• Fleet coverage breadth: Demonstrated capability across a minimum of three (3) heavy diesel equipment classes — haul trucks ≥150-tonne payload, motor graders, and tracked dozers — evidenced by OEM authorisation letters or equivalent competency records submitted with tender response.

Site-Specific Operational Constraints

Conditions procurement must communicate to all bidders in tender documentation for Brockman.

• Environment: West Pilbara conditions impose sustained summer ambient temperatures of 45°C and peak events reaching 48°C, combined with fine iron ore dust loading on air filtration systems and engine cooling circuits. Wet season rainfall events can temporarily restrict access on unpaved internal haul roads; contractors must hold contingency protocols for service continuity during road closures. All field service vehicles must carry heat-rated consumables and coolant stocks sized for same-day replenishment without hub resupply.
• Logistics: Brockman sits approximately 1,049 km from Perth by road, with Newman (~265 km) as the nearest serviceable hub for parts staging and crew rotation. Internal site access is exclusively via unpaved haul road networks within the West Pilbara — all field service vehicles must be 4WD-capable and compliant with site road rules. Critical parts not pre-positioned at Newman must be freighted via charter air to Boolgeeda airfield; tender documentation must specify parts pre-positioning obligations and minimum on-hand consumable inventory levels.
• Response SLA: Emergency breakdown call-out response: 2–4 hours from point of notification for pre-positioned crews at Newman or on-site. Extended mobilisation from Perth or Karratha: maximum 12–24 hours. Scheduled shutdown window participation must be confirmed in writing no less than 14 days prior to planned maintenance events, consistent with site shutdown coordination protocols.
• Roster: FIFO rotation via charter flights from Perth (PER) or Karratha (KTA) to Boolgeeda airfield is the standard access mode. Contractors must nominate a roster pattern compatible with site swing schedules (typically 8/6 or 14/7) and maintain a minimum standby crew complement on-site or at Newman to cover emergency call-out within the 2–4 hour SLA window without relying on the next scheduled FIFO rotation.
• Camp/facilities: Site-provided accommodation at Brockman is subject to Rio Tinto / Hamersley Iron Pty Ltd camp allocation and booking procedures. Contractors must confirm camp access arrangements prior to mobilisation; self-sufficient camp capability at Newman must be held as a contingency where site accommodation is unavailable during peak shutdown periods.

Contractor Capability Checklist

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

• Technical certifications: OEM authorisation letters for at least one major haul truck manufacturer (Caterpillar, Komatsu, or Hitachi) and evidence of compliance with AS 4024 (Safety of Machinery) where field modifications or tooling fabrication are within scope; MARCSTA site access registration required prior to mobilisation.
• Personnel tickets: All mechanics must hold a current WA Certificate of Competency (Plant Mechanic or equivalent) or nationally recognised Certificate III in Mobile Plant Technology (AUR32116 or successor). Confined space entry and working-at-heights tickets required for personnel servicing elevated drivetrain components or undercarriage assemblies on large-format equipment.
• Mobilisation SLA: Documented evidence of achieving ≤4-hour emergency response from a pre-positioned crew at a comparable Pilbara iron ore operation — minimum two (2) verifiable site references with contact details submitted with tender response.
• Public Liability insurance: Minimum AUD $20M per occurrence (Certificate of Currency required with tender submission).
• Professional Indemnity: Minimum AUD $10M aggregate — mandatory where scope includes diagnostic reporting, condition-based maintenance scheduling advice, or any written technical specification issued to the operator.
• Workers Compensation: Full statutory cover under WA law (WorkCover WA — Injury Management Plan required and must be submitted with prequalification documentation).
• Site exposure: Minimum 3 years of continuous mobile heavy diesel service delivery at an open cut iron ore operation, with at least one site operating under comparable BIF-hosted hematite geology and 200-tonne-class haul truck fleet — commodity type and extraction method must be confirmed in reference letters.
• Safety systems: Documented HSE management system certified to ISO 45001 or equivalent; demonstrated ICAM (Incident Cause Analysis Method) investigation capability required, with at least one completed ICAM report available for review upon request during evaluation.

Regulatory & HSE Framework

The applicable regulatory framework is the Work Health and Safety Act 2020 (WA) and the Work Health and Safety (Mines) Regulations 2022 (WA), administered by WorkSafe WA. For mobile heavy diesel mechanics operating on an active open pit mine, specific obligations under the Mines Regulations 2022 include plant registration, risk management for high-energy isolation (LOTO/LOTOTO procedures on heavy mobile equipment), and competency verification for persons performing prescribed functions. All contractors must maintain site-specific LOTO registers and demonstrate compliance with the site's energy isolation standards as a condition of mobilisation. Prequalification and ongoing compliance management is conducted through Avetta (https://www.avetta.com/) and the Rio Tinto Supplier Portal (https://www.riotinto.com/en/procurement/suppliers) — portal registration is mandatory prior to RFQ participation, and active Avetta profiles must reflect current insurance, safety statistics, and competency records. All personnel must complete site-specific induction via Rio Tinto / Hamersley Iron Pty Ltd procedures before mobilisation, including any Brockman-specific traffic management and haul road safety induction modules.

Sourcing Qualified Contractors

No confirmed tender activity for this specific scope at Brockman is on file at the time of this briefing. The regional labour pool for mobile heavy diesel mechanics in the Pilbara is concentrated around Newman (~265 km from Brockman), with an estimated 3–5 active providers capable of meeting the site's response SLA and fleet coverage requirements. This is a constrained market relative to the technical depth required — contractors with OEM authorisation across multiple haul truck platforms and active telematics integration credentials represent a subset of that pool. Procurement teams engaging this market must allow a minimum of 6–8 weeks for prequalification, Avetta profile verification, and operator portal onboarding before RFQ responses can be formally evaluated. Contractors with confirmed regional exposure include SHIFT Diesel and Earth, Everything Diesel, and Marlee Resources (noted as market reference only, not endorsement). Evaluation panels are advised to weight demonstrated Pilbara open pit iron ore experience and pre-agreed shutdown participation history heavily in shortlisting, given the 12–24 hour mobilisation envelope and the operational consequences of extended haul truck downtime at a 34 Mtpa production rate.