# David Rayfield General Manager - Koolan Island Operations ## Career chronology - **Role shown in 2025-10-10; exact start not established: MGX Resources Limited** — General Manager - Koolan Island Operations. [Annual Report to shareholders]() (Annual Report to shareholders; directors’ report/corporate directory, roster disclosure) - **Joined company/site in 2012; appointed GM Koolan Island Operations in 2023 per issuer biography; prior exact roles are not supplied.: Mount Gibson Iron / MGX** — Koolan Island operations management. [Management]() (Management biographies: profile for David Rayfield) ## Business failures and setbacks ### Koolan Island Main Pit rockfall led to suspension of mining [mgx_david_rayfield_batch_outcome] 2025-10-16 · issuer reported · medium materiality On 16 October 2025 a major rockfall occurred on the eastern footwall at Koolan Island. MGX reported no injuries after monitoring systems gave warning, but said mining was suspended; remediation was not viable against future stability risks, time, cost and remaining mine life. It withdrew guidance and estimated closure/transition costs at A$30–40 million. FY2025 had already seen lower operating cash flow and a A$90.4 million impairment, before the later rockfall. **Attribution:** Role overlaps event; causation unproven. The cited record establishes a company or employer event. For role\_overlap, the executive held a relevant role in the period, but the reviewed source does not establish personal causation or an individual enforcement finding. For employer\_only, no individual link or matching tenure was established. **Relevance:** This is relevant context for assessing General Manager - Koolan Island Operations at the same employer; it should not be read as proof of individual performance or misconduct. [Koolan Island Operations Update]() (Koolan Island Operations Update, paragraphs “Rockfall Event” and “Operational Implications”; FY2025 Annual Report, operating/cash flow and impairment disclosures.) ## Suitability for the current role ### Role fit evidence is limited for General Manager - Koolan Island Operations [mgx_david_rayfield_rolefit] Role shown in 2025-10-10; exact start not established · analyst inference · low materiality Issuer sources describe David Rayfield’s current role and prior experience, including Mount Gibson Iron / MGX: Joined company/site in 2012; appointed GM Koolan Island Operations in 2023 per issuer biography; prior exact roles are not supplied. The background is relevant context for General Manager - Koolan Island Operations; the claims are issuer-reported and personal contribution to outcomes is not inferred. **Attribution:** Responsibility not applicable. No outcome responsibility is inferred from title alone. **Relevance:** The role is relevant to the company’s current stage; available evidence supports only a limited assessment of David Rayfield’s professional suitability. [Management]() (Management biographies: profile for David Rayfield) ## Evidence gaps - Individual contribution to company outcomes was not established. - The combined name-based web searches were not exhaustive checks of court, criminal, sanctions, credential, or regulator databases; no clearance conclusion is possible. - Complete prior-employer dates, qualifications and individual contributions were not independently verified from primary sources for this executive.