Mobile Heavy Diesel Mechanics at Bannockburn.

Service Requirements at Bannockburn

Bannockburn's open pit gold operation in the Mt. Malcolm district presents a specific mechanical maintenance demand profile driven by active haul fleet cycling across pit-to-plant infrastructure. With ore being hauled to the Thunderbox processing plant via dedicated haul roads, drivetrain and powertrain loads on heavy diesel equipment are continuous and operationally critical. Northern Star Resources requires mobile heavy diesel mechanics capable of field-based diagnostics, component exchange, and preventive maintenance on open pit haul and ancillary equipment without reliance on fixed workshop infrastructure. The greenstone belt geology at Bannockburn generates abrasive, high-silica road surfaces that accelerate wear on undercarriage, braking systems, and air filtration assemblies — contractors must demonstrate familiarity with accelerated service interval management in equivalent geological environments. Scope documentation should specify maximum allowable equipment downtime per unplanned breakdown event as a minimum performance threshold.

• Thermal operating competency: Demonstrated field service delivery in sustained ambient temperatures of 40°C, with documented exposure to peak conditions of 44°C; minimum 24 months of qualifying Goldfields semi-arid site experience within the last five years, evidenced by verifiable site references.
• Fleet coverage breadth: Proven capability across a minimum of three heavy diesel equipment classes relevant to open pit operations (e.g. rigid haul trucks, graders, water carts, or equivalent ancillary fleet); OEM service authorisation or documented equivalent competency for at least two equipment classes to be submitted with tender response.
• Parts and consumables self-sufficiency: Contractor must demonstrate a regional consignment stock or depot arrangement within 350 km of site, capable of supplying critical wear components and fluids within a maximum 12-hour replenishment window from point of order.

Site-Specific Operational Constraints

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

• Environment: Goldfields-Esperance semi-arid conditions impose sustained summer ambient temperatures of 40°C and peaks to 44°C, combined with persistent fine silica dust generated by haul road traffic on greenstone-derived surfaces. Contractors must specify dust ingress protection protocols for mobile service vehicles and tool inventory, and demonstrate heat-illness prevention procedures compliant with WA mining standards.
• Logistics: Bannockburn is approximately 620 km from Perth and ~260 km from the nearest regional hub at Kalgoorlie-Boulder via sealed highway, with final site access via the Great Central Road corridor through Leonora (~60 km north). All parts, tooling, and consumable freight must be routed through a confirmed Kalgoorlie or Leonora staging point; tender documentation must require contractors to nominate their freight and parts-staging arrangement explicitly.
• Response SLA: Emergency breakdown call-out response must be achievable within 2–4 hours for on-roster personnel already mobilised to site. Extended mobilisation from regional depot (Kalgoorlie or Leonora) must not exceed 12–24 hours from notification. Contractors must submit a documented response protocol distinguishing on-site standby response from off-site mobilisation scenarios.
• Roster: FIFO roster compatibility is mandatory; contractors must demonstrate capacity to maintain continuous coverage across standard Goldfields swing patterns (typically 8/6 or 14/7) without service gaps at roster changeover. Proof of concurrent multi-site mobilisation management — including named coordination protocols with existing site workforce — is required at tender stage.
• Camp/facilities: Site-provided accommodation availability must be confirmed with Northern Star Resources site management prior to RFQ issue. Contractors must declare whether their mobilisation model is self-sufficient (self-contained camp capability) or dependent on site-provided facilities, and tender documentation must specify which basis applies to avoid scope ambiguity at contract award.

Contractor Capability Checklist

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

• Technical certifications: OEM service authorisation for at least two heavy diesel equipment classes present in the Bannockburn open pit fleet, or documented equivalent competency via AS/NZS-aligned training records; MARCSTA site access registration required prior to mobilisation.
• Personnel tickets: All field mechanics must hold a current WA Certificate of Competency relevant to their equipment class; surface mining site induction currency and valid driver's licence for heavy vehicle access on haul road corridors are mandatory for all deployed personnel.
• Mobilisation SLA: Documented evidence of achieving 2–4 hour on-site response and 12–24 hour off-site mobilisation from at least one comparable Goldfields-Esperance open pit operation within the last three years; reference contacts must be provided and available for verification.
• Public Liability insurance: Minimum AUD $20M per occurrence (Certificate of Currency required with tender submission; policy must explicitly cover mobile field operations at remote mine sites).
• Professional Indemnity: Minimum AUD $10M aggregate where the contractor's scope includes technical specification of service intervals, component selection advice, or maintenance programme design recommendations.
• Workers Compensation: Full statutory cover under WA law (WorkCover WA — Injury Management Plan required and must be submitted as part of HSE documentation package).
• Site exposure: Minimum three years of documented open pit gold or equivalent hard-rock mining site exposure within the Goldfields-Esperance region; commodity type and extraction method must be specified in the capability statement submitted with tender response.
• Safety systems: Operational HSE management system certified to ISO 45001 or demonstrably equivalent standard; ICAM-trained incident investigation capability required given remote site response constraints and the absence of proximate emergency services infrastructure.

Regulatory & HSE Framework

All mobile heavy diesel mechanics services at Bannockburn operate under the Work Health and Safety Act 2020 (WA) and the Work Health and Safety (Mines) Regulations 2022 (WA), administered by WorkSafe WA. For field mechanics operating mobile service units on active haul roads and within the open pit exclusion zones, specific risk controls under the WHS (Mines) Regulations 2022 — including isolation and lockout/tagout procedures for heavy diesel equipment — must be documented in the contractor's Safe Work Method Statements prior to mobilisation. Northern Star Resources administers contractor prequalification and ongoing compliance monitoring through the Cm3 platform and the Northern Star Supplier Portal; portal registration is mandatory prior to RFQ participation, and prequalification status must be current at the time of tender submission. Contractors must treat Cm3 portal information as best-effort guidance and confirm current registration requirements directly with the Northern Star Resources procurement team before commencing onboarding.

Sourcing Qualified Contractors

No confirmed tender activity for mobile heavy diesel mechanics at Bannockburn is on record at the time of this briefing. The regional labour and contractor pool for this service in Goldfields-Esperance is centred on Kalgoorlie-Boulder (~260 km from site), which functions as the primary staging hub for field mechanics servicing open pit operations across the Mt. Malcolm and broader northern Goldfields corridor. At least five contractors actively supplying mobile heavy diesel mechanics services in the Goldfields-Esperance region are listed on the WA Mining Index, providing a viable competitive field for a structured RFQ process. No incumbent contractors have been confirmed for Bannockburn; procurement teams must treat the market as open and conduct capability assessment from first principles. Given the 620 km Perth-to-site distance and the mandatory Cm3 prequalification requirement, procurement teams engaging this market should allow a minimum of four to six weeks for prequalification, portal onboarding, and depot/consignment stock arrangement verification before RFQ close.