# Luke Buchanan

Vice President, Project and Strategic Planning

## Career chronology

- **Appointed 10 Aug 2026: Challenger Gold** — Vice President, Project and Strategic Planning. [Directors &amp; Management](<https://challengergold.com/corporate/directors-and-management/>) (Luke Buchanan biography and appointment date); [Challenger Gold sharpens Hualilan development pathway](<https://challengergold.com/wp-content/uploads/ChallengerGoldSharpensHualilanDevelopmentPathway13Aug26.pdf>) (Leadership reset)

- **Immediately before Challenger; appointment date not established: New Gold** — Vice President, Technical Services. [Directors &amp; Management](<https://challengergold.com/corporate/directors-and-management/>) (Luke Buchanan biography); [New Gold 2024 Management Information Circular](<https://s28.q4cdn.com/380852864/files/doc_financials/2024/ar/Management-Information-Circular-V6-March-21-2025-Final.pdf>) (Management circular biography and responsibilities)

- **Before New Gold; dates not established: Yamana Gold** — Senior Vice President, Technical Services. [Directors &amp; Management](<https://challengergold.com/corporate/directors-and-management/>) (Luke Buchanan biography); [New Gold 2024 Management Information Circular](<https://s28.q4cdn.com/380852864/files/doc_financials/2024/ar/Management-Information-Circular-V6-March-21-2025-Final.pdf>) (Management circular biography)

- **Earlier career in Australia and Canada; dates not established: Newmont, AMC Consultants, Primero Mining** — Progressively senior operating and technical roles. [Directors &amp; Management](<https://challengergold.com/corporate/directors-and-management/>) (Luke Buchanan biography); [New Gold 2024 Management Information Circular](<https://s28.q4cdn.com/380852864/files/doc_financials/2024/ar/Management-Information-Circular-V6-March-21-2025-Final.pdf>) (Management circular biography)

## Education and qualifications

### Mining engineering degree reported by issuer [luke_education]

By 2025 · issuer reported · medium materiality

Challenger and New Gold issuer materials report a Bachelor of Mining Engineering from the University of New South Wales; direct degree verification was not completed.

**Attribution:** Responsibility not applicable. Issuer reports degree and technical experience; no university register or credential document reviewed.

**Relevance:** Directly relevant to planning, reserves and project development.

[Directors &amp; Management](<https://challengergold.com/corporate/directors-and-management/>) (Luke Buchanan biography); [New Gold 2024 Management Information Circular](<https://s28.q4cdn.com/380852864/files/doc_financials/2024/ar/Management-Information-Circular-V6-March-21-2025-Final.pdf>) (Management circular biography)

## Contributions and company outcomes

### Technical-services remit covered reserves, studies and operating support at New Gold [luke_delivery]

2024 · issuer reported · medium materiality

New Gold’s 2025 management circular says Buchanan oversaw mine planning, resource/reserve estimates, technical studies and operating support, and reports he led technical reports and reserve preparation in 2024. These are employer-reported team/role outcomes and do not prove sole authorship or financial value.

**Attribution:** Individual involvement documented. The issuer directly links him to the technical-services remit and listed 2024 results; other contributors are not separated.

**Relevance:** Relevant technical evidence for Challenger’s project-planning VP role.

[New Gold 2024 Management Information Circular](<https://s28.q4cdn.com/380852864/files/doc_financials/2024/ar/Management-Information-Circular-V6-March-21-2025-Final.pdf>) (2024 results and biography)

## Business failures and setbacks

### Project planning responsibility now includes inherited grade and processing reset [luke_hualilan_reset]

2026 · documented · high materiality

The July 2026 report describes weaker-than-expected upper-pit grade continuity linked to channel-sample bias; Challenger then moved away from Casposo toll processing, terminating the agreement on 1 Oct. Buchanan joined on 10 Aug after the model issue and initial campaign. No evidence attributes the prior model or termination decision to him.

**Attribution:** Role overlaps event; causation unproven. He was appointed during the strategic reset; no direct responsibility for antecedent model assumptions is established.

**Relevance:** Material project planning and reserve-reconciliation challenge in his new remit.

[Quarterly Activities Report](<https://aj-invest.org/m/asx/2924-03116964-6A1336843>) (Quarterly Activities Report); [Austral subsidiary and Challenger call it quits on toll agreement](<https://mining.com.au/austral-subsidiary-and-challenger-call-it-quits-on-toll-agreement/>) (Termination effective date and payment); [Directors &amp; Management](<https://challengergold.com/corporate/directors-and-management/>) (Appointment date)

## Evidence gaps

- Role chronology and education rely partly on issuer biographies; dates and credentials require primary-source confirmation where not specifically documented.

- Person-specific court, regulator, sanctions, professional-discipline and safety/environment register searches were not exhaustive.

- Hualilan technical and economic outcomes are project-level; no source establishes sole personal responsibility for outcomes.

- Company transition and counterpart disclosures are reported distinctly; no denial or allegation has been treated as an independent finding.