Mobile Heavy Diesel Mechanics at Apache.

Service Requirements at Apache

Mobile heavy diesel mechanics at Apache must be scoped to service open pit mining equipment operating across structurally controlled gold-bearing ground in the East Coolgardie district. The fleet profile typical of surface gold extraction in this corridor — including haul trucks, excavators, graders, and ancillary diesel-driven plant — demands contractors with documented multi-OEM capability rather than single-platform specialisation. Norton Gold Fields Pty Ltd (subsidiary of Zijin Mining Group Co., Ltd.) holds the tenement, and with a major expansion approval granted for the Binduli operations corridor in mid-2025, procurement must scope diesel maintenance capability that can scale with evolving fleet demand as new pit development progresses under forthcoming approvals. Scope documentation should specify multi-OEM heavy diesel competency across surface mining equipment classes as a minimum performance threshold.

• Ambient temperature operating range: Demonstrated service delivery in sustained ambient conditions of 40°C, with documented procedures for peak thermal events to 44°C — minimum 24 months of verified Goldfields semi-arid field exposure within the last 5 years, evidenced by site reference letters or equivalent.
• Fleet coverage breadth: Minimum 3 OEM platforms across haul truck, excavator, or ancillary diesel plant categories, evidenced by OEM authorisation letters or documented service records from equivalent open pit gold operations.
• Parts and consumables self-sufficiency: Contractor must demonstrate a regional depot or pre-positioned consignment stock arrangement within 50 km of Kalgoorlie, capable of supplying critical diesel components (injectors, turbochargers, filters, seals) without reliance on Perth-based dispatch for routine call-outs.

Site-Specific Operational Constraints

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

• Environment: The Goldfields-Esperance semi-arid climate imposes sustained summer ambient temperatures of 40°C and peak events reaching 44°C, with fine laterite and silica dust accelerating filter and fuel system degradation. Diesel mechanics must carry appropriate PPE and equipment rated for these conditions; tender documentation must require heat management protocols specific to field servicing in open pit environments.
• Logistics: Apache sits approximately 541 km from Perth, with Kalgoorlie the primary logistics hub at roughly 10 km. Primary access is via the Binduli operations corridor using regional sealed and unsealed roads. The 541 km Perth separation makes same-day metropolitan dispatch non-viable for emergency breakdown response; all bidders must demonstrate Kalgoorlie-based or equivalent regional staging capability as a condition of tender participation.
• Response SLA: Emergency mechanical breakdown response: 2–4 hours from Kalgoorlie hub to site. Extended mobilisation for planned maintenance or major component exchange: 12–24 hours. Scheduled preventive maintenance windows must be agreed in the service schedule and must not rely on Perth-based crew deployment for routine call-outs.
• Roster: DIDO roster compatibility is required, aligned to daily drive-in/drive-out patterns from the Kalgoorlie hub. Contractors must specify standby crew arrangements to maintain SLA coverage across all operational shifts without creating single-point-of-failure exposure in the field mechanic roster.
• Camp/facilities: Given the DIDO access model from Kalgoorlie, contractors are not expected to require on-site accommodation for routine deployments. However, extended breakdown or major component replacement scenarios may require self-sufficient field crew capability; contractors must specify their contingency arrangements for multi-day on-site presence in tender submissions.

Contractor Capability Checklist

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

• Technical certifications: OEM authorisation documentation for a minimum of 3 heavy diesel platforms relevant to open pit surface mining (e.g. Caterpillar, Komatsu, Hitachi, or equivalent); compliance with AS 3788 (pressure equipment in-service inspection) where applicable to diesel-driven plant.
• Personnel tickets: All field mechanics must hold a current Certificate III in Mobile Plant Technology (or equivalent heavy diesel trade qualification recognised under WA law); site-specific surface mining induction competency required prior to mobilisation; first aid certification (minimum Level 2) mandatory for all field-deployed personnel.
• Mobilisation SLA: Documented evidence of 2–4 hour emergency response from a Kalgoorlie-equivalent regional hub to a Goldfields-Esperance mine site, drawn from at least two reference engagements within the last 3 years.
• Public Liability insurance: Minimum AUD $20M per occurrence (Certificate of Currency required with tender submission).
• Professional Indemnity: Minimum AUD $10M aggregate where the contractor's scope includes technical specification of replacement components, maintenance programme design, or advisory services on fleet condition.
• Workers Compensation: Full statutory cover under WA law (WorkCover WA — Injury Management Plan required and must be submitted with tender response).
• Site exposure: Minimum 3 years of documented heavy diesel field servicing at open pit gold or equivalent hard-rock surface mining operations in WA; commodity type and extraction method must be specified in the capability statement.
• Safety systems: 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 as evidence upon request.

Regulatory & HSE Framework

All diesel mechanics engaged at Apache 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 mobile field mechanics specifically, compliance obligations extend to plant registration requirements, isolation and lockout/tagout procedures for diesel-driven equipment, and confined space entry protocols where applicable to engine bay or undercarriage work. The field servicing environment — open pit surface workings in the East Coolgardie district — requires contractors to maintain current Safe Work Method Statements (SWMS) for all high-risk construction and maintenance work as defined under the WHS (Mines) Regulations 2022. Contractor registration via the Gold Fields Supplier Portal is cited as the likely onboarding pathway; procurement teams are advised to treat this as best-effort information and confirm portal access requirements directly with the operator prior to RFQ release. All contractors must complete site-specific induction via Norton Gold Fields Pty Ltd (subsidiary of Zijin Mining Group Co., Ltd.) procedures before mobilisation, with induction records retained and available for WorkSafe WA audit on request.

Sourcing Qualified Contractors

No confirmed tender activity for mobile heavy diesel mechanics at Apache is on record at the time of this briefing. The regional labour pool for this trade in the Goldfields-Esperance region is centred on Kalgoorlie (~10 km from site), with approximately 5 or more active providers operating across the district. This pool is shared across multiple gold and nickel operations in the East Coolgardie corridor, meaning contractor availability can tighten during concurrent fleet breakdown events or peak planned maintenance cycles across the region. Procurement must account for this competitive demand on regional mechanic capacity when setting RFQ timelines. No incumbent contractors are confirmed for this site; shortlisting should be conducted on the basis of documented regional capability rather than assumed continuity. Allow a minimum of 4–6 weeks for prequalification, insurance verification, and operator portal onboarding before planned mobilisation dates. Where the site's activity level or fleet configuration is subject to change as new pit development advances, RFQ scope should include a volume-flexible call-out schedule rather than fixed-term crew commitments.