Mobile Heavy Diesel Mechanics at Devon.

Service Requirements at Devon

Devon's open pit gold operation, commissioned in 2025 and currently producing under the joint venture of Matsa Resources Limited / BML Ventures (50/50 Joint Venture), places specific mechanical demands on mobile diesel assets that procurement must translate directly into RFQ scope. Shear zone hosted mineralisation drives a haul road network where heavy diesel equipment — including excavators, haul trucks, and ancillary surface mining plant — operates continuously across a producing site targeting approximately 28,000 ounces of recovered gold per annum. That sustained output cycle imposes drivetrain and hydraulic loading on mobile assets that exceeds standard OEM service intervals, meaning contractors must demonstrate capacity for unscheduled breakdown response alongside planned preventive maintenance windows. The 695 km distance from Perth to site eliminates any realistic same-day parts-and-technician dispatch from metropolitan depots; contractors without pre-positioned tooling and consumables in the Goldfields-Esperance corridor will structurally fail SLA requirements before a single breakdown occurs. Scope documentation should specify maximum unplanned downtime per critical haul unit as a minimum performance threshold.

• Ambient temperature capability: Demonstrated diagnostic and repair delivery in sustained ambient conditions of 40°C, with documented procedures for peak thermal events to 44°C — evidence required via prior Goldfields-Esperance or equivalent arid-zone site records within the last 5 years
• Goldfields site exposure: Minimum 18 months continuous or aggregate exposure on open pit gold or equivalent hard-rock surface mining operations in the Goldfields-Esperance region, evidenced by verifiable site references and personnel deployment records
• FIFO logistics method statement: Mandatory submission of a documented FIFO mobilisation plan addressing the 695 km Perth-to-Devon logistics envelope, including technician rotation schedules, parts pre-positioning strategy at Kalgoorlie (~187 km), and contingency escalation for concurrent multi-site mobilisation events

Site-Specific Operational Constraints

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

• Environment: Goldfields-Esperance conditions impose sustained summer ambient temperatures of 40°C and peak events to 44°C, combined with fine laterite and calcrete dust that accelerates air filter and fuel system degradation on mobile diesel plant. Contractor method statements must address heat-load management for both personnel and equipment, including shade-compliant work procedures and fluid-change interval adjustments for high-ambient operation.
• Logistics: Devon sits approximately 695 km from Perth and ~187 km from Kalgoorlie, the nearest viable hub for parts sourcing and technician staging. All tender documentation must specify that contractors are required to maintain a Kalgoorlie-based or equivalent Goldfields parts buffer for critical consumables (filters, injectors, belts, seals) sufficient to support a minimum 72-hour autonomous response without metropolitan resupply.
• Response SLA: Emergency breakdown call-out on critical haul and excavation plant: 2–4 hours on-tool response from technician on-site or on-roster standby. Extended mobilisation for specialist OEM-level diagnostics or major component exchange: 12–24 hours from call-out confirmation. Both SLA tiers must be documented with evidence from comparable Goldfields-Esperance operations.
• Roster: FIFO roster compatibility is mandatory. Contractors must submit proposed rotation patterns (minimum 8/6 or equivalent) that align with Devon's site access schedule and do not create single-point-of-failure coverage gaps during crew changeover. Proof of concurrent multi-site mobilisation management — including named coordination protocols with existing site workforce — is required at tender stage.
• Camp/facilities: Devon's accommodation village is available on-site; contractors must confirm in tender response whether personnel will utilise site-provided facilities or require self-sufficient camp arrangements. Any self-sufficient configuration must comply with site access and environmental conditions applicable to the Mt. Morgans district.

Contractor Capability Checklist

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

• Technical certifications: OEM authorisation or documented OEM-aligned competency for heavy diesel plant classes deployed at Devon (including haul trucks and excavators relevant to open pit gold operations); compliance with AS 3788 (pressure equipment in-service inspection) where applicable to diesel plant components
• Personnel tickets: All field technicians must hold a current WA Certificate of Competency relevant to their trade classification; surface mining site induction compliance under WHS (Mines) Regulations 2022 (WA); MARCSTA or equivalent Goldfields regional safety card required prior to first site entry
• Mobilisation SLA: Documented evidence of 2–4 hour emergency response achievement from equivalent Goldfields-Esperance open pit operations within the last 3 years, including client-verifiable contact references
• Public Liability insurance: Minimum AUD $20M per occurrence (Certificate of Currency required with tender submission)
• Professional Indemnity: Minimum AUD $10M aggregate — mandatory where contractor scope includes technical specification of component replacements, maintenance scheduling advice, or equipment condition assessments that influence capital decisions
• Workers Compensation: Full statutory cover under WA law (WorkCover WA — Injury Management Plan required and must be submitted with prequalification documentation)
• Site exposure: Minimum 18 months verifiable deployment on open pit gold or equivalent surface hard-rock mining operations; references must confirm high-ambient arid-zone conditions and FIFO workforce management at comparable scale
• Safety systems: HSE management system certified to ISO 45001 or equivalent; demonstrated ICAM (Incident Cause Analysis Method) investigation capability required, given the remote location and extended emergency response timelines inherent to the Mt. Morgans district

Regulatory & HSE Framework

Applicable framework under the Work Health and Safety Act 2020 (WA) and the Work Health and Safety (Mines) Regulations 2022 (WA), administered by WorkSafe WA. Mobile heavy diesel mechanics operating at Devon are classified as surface mine workers under the WHS (Mines) Regulations 2022 (WA); all contractor personnel must hold current competencies consistent with surface extraction activities and comply with site-specific emergency response procedures relevant to the Mt. Morgans district's remote location and extended evacuation timelines. Supplier portal not publicly confirmed. Verify via Matsa Resources Limited / BML Ventures (50/50 Joint Venture) corporate procurement contact. All contractors must complete site-specific induction via Matsa Resources Limited / BML Ventures (50/50 Joint Venture) procedures before mobilisation.

Sourcing Qualified Contractors

No confirmed public tender activity for mobile heavy diesel mechanics at Devon has been identified at the time of this briefing, consistent with the site's 2025 commissioning timeline and early-stage production ramp. The regional labour pool for mobile heavy diesel mechanics in the Goldfields-Esperance corridor is centred on Kalgoorlie (~187 km from Devon), where a concentration of contractors servicing open pit gold and nickel operations maintains active field teams. Procurement teams engaging this market must account for high regional demand on experienced diesel technicians — particularly those with documented high-ambient capability at 40°C sustained and 44°C peak conditions — which compresses available contractor capacity during summer mobilisation windows. No incumbents have been confirmed via public sources; market engagement should proceed via direct Goldfields-based contractor outreach and regional industry networks. Allow a minimum of 6–8 weeks for prequalification, FIFO method statement review, and onboarding confirmation prior to planned mobilisation at Devon.