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2026-11-06
◂ Monitor CYM ASX

Cyprium Metals Limited

Construction · Copper · Australia Rating locked: sign in to view v8 · cym-20261009t150554-first-fill
Last 2026-11-06
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People, delivery and responsibility

Management background checks

Evidence through 2026-10-31

Research assessment

Executive team

Rating locked: sign in to viewTeam rating and score are available to subscribers

The issuer has assembled finance, project-development, operations and technical leadership for the Nifty restart. Commissioning has begun, while first cathode was still expected in the coming weeks at the 30 October cutoff. Several career claims are issuer-reported and individual contributions to company outcomes remain incompletely established.

Decision-relevant facts

Material summary

Individual involvement and employer context shown separately

J. Matthew Fifield

Executive Chairman

Current
Full background report for J. Matthew Fifield
FailureIssuer Reported · Medium materiality

Restart target moved while commissioning progressed

The January 2026 quarterly anticipated first cathode by mid-2026. The 30 October quarterly reported leaching and plant commissioning had commenced and expected first cathode in coming weeks; it did not report first cathode production.

Role overlaps event; causation unproven · The evidence records company-level outcomes during the role; individual causation or blame has not been established.

September 2026 quarterly activities · Pages 1–3, highlights and commissioning
Evidence gaps · 1
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

Full background report

J. Matthew Fifield

Executive Chairman

Career chronology

  • Current role; start date not stated in selected roster: Cyprium Metals Limited — Executive Chairman. Diggers & Dealers Presentation (Slide 17, board and management; 4 August 2026)

  • Current; company profile reports resource-investment and mine restart experience: Pacific Road Capital — Managing Director. Team (Named professional biography)

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to J. Matthew Fifield individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Business failures and setbacks

Restart target moved while commissioning progressed

2026 · issuer reported · medium materiality

The January 2026 quarterly anticipated first cathode by mid-2026. The 30 October quarterly reported leaching and plant commissioning had commenced and expected first cathode in coming weeks; it did not report first cathode production.

Attribution: Role overlaps event; causation unproven. The evidence records company-level outcomes during the role; individual causation or blame has not been established.

Relevance: The changed timetable and financing are relevant to restart execution and board oversight.

December 2025 quarterly activities (Page 1, highlights); September 2026 quarterly activities (Pages 1–3, highlights and commissioning)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

Experience with Pacific Road and capital raising is relevant to the restart chair role, although individual investment outcomes and full tenure chronology remain incompletely corroborated.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Team (Fifield biography)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

Colin Mackey

Chief Operating Officer

Current
Full background report for Colin Mackey
FailureDocumented · Medium materiality

Jadar licensing setback and later status

Mackey led Rio Tinto European operations from October 2021 and was subsequently identified by Cyprium as managing director of Jadar and European operations. In January 2022 Serbia revoked the Jadar spatial plan after environmental protests. The Constitutional Court overturned the repeal in July 2024, and Rio later said it placed Jadar in care and maintenance. Exact Jadar-specific appointment and departure dates have not been independently established.

Role overlaps event; causation unproven · Mackey’s European role overlapped the 2022 setback; the precise scope of his Jadar responsibility and any personal contribution are unproven. The 2024 court ruling and later company decision occurred after his Rio role, based on the issuer’s 2024 Cyprium COO profile.

Mining Report Glückauf 1/2023 · Issue 1/2023, Colin Mackey interview
Government revokes spatial plan for Jadar · 20 January 2022 government announcement
Constitutional Court decision IUo-39/2022 · Decision dated 11 July 2024
Rio Tinto 2025 annual report · Page 16, financial review
Key management team · Mackey biography
Evidence gaps · 2
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.
  • Exact start and end dates of the Jadar-specific role and individual responsibility for project decisions remain unverified; the 2024 reversal and subsequent care-and-maintenance decision are later company events.

Full background report

Colin Mackey

Chief Operating Officer

Career chronology

  • Current role; start date not stated in selected roster: Cyprium Metals Limited — Chief Operating Officer. Diggers & Dealers Presentation (Slide 17, board and management; 4 August 2026)

  • Previous role; dates not stated: Gold Fields — Mining role. Key management team (Named professional biography)

  • Previous role; dates not stated: BHP — Mining role. Key management team (Named professional biography)

  • Previous role; dates not stated: Thiess — Mining role. Key management team (Named professional biography)

  • Joined 2003: Rio Tinto — Construction, development and operational improvement roles. Key management team (Named professional biography)

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to Colin Mackey individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Business failures and setbacks

Jadar licensing setback and later status

2021–2026 · documented · medium materiality

Mackey led Rio Tinto European operations from October 2021 and was subsequently identified by Cyprium as managing director of Jadar and European operations. In January 2022 Serbia revoked the Jadar spatial plan after environmental protests. The Constitutional Court overturned the repeal in July 2024, and Rio later said it placed Jadar in care and maintenance. Exact Jadar-specific appointment and departure dates have not been independently established.

Attribution: Role overlaps event; causation unproven. Mackey’s European role overlapped the 2022 setback; the precise scope of his Jadar responsibility and any personal contribution are unproven. The 2024 court ruling and later company decision occurred after his Rio role, based on the issuer’s 2024 Cyprium COO profile.

Relevance: A former project’s difficult permitting and stakeholder context illustrates delivery and social-licence exposure, not personal wrongdoing.

Mining Report Glückauf 1/2023 (Issue 1/2023, Colin Mackey interview); Government revokes spatial plan for Jadar (20 January 2022 government announcement); Constitutional Court decision IUo-39/2022 (Decision dated 11 July 2024); Rio Tinto 2025 annual report (Page 16, financial review); Key management team (Mackey biography)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

Reported mining engineering experience and European project leadership are relevant to operating a complex restart, subject to the Jadar permitting context and incomplete exact tenure dates.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Key management team (Mackey biography)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

  • Exact start and end dates of the Jadar-specific role and individual responsibility for project decisions remain unverified; the 2024 reversal and subsequent care-and-maintenance decision are later company events.

Jeff Sommers

Chief Financial Officer

Current
Full background report for Jeff Sommers
Company SuccessIssuer Reported · Medium materiality

Finance profile and completed funding

Cyprium announced Sommers as CFO on 27 June 2025. It reported completing an A$80 million capital raise by the December 2025 quarter and later announced up to A$83 million of debt and equity funding, some conditional, after the September 2026 quarter.

Role overlaps event; causation unproven · The evidence records company-level outcomes during the role; individual causation or blame has not been established.

September 2026 quarterly activities · Page 1, funding package footnote
Evidence gaps · 2
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.
  • The issuer reports a Wisconsin accountancy masters and CPA designation; independent award and membership verification was not obtained.

Full background report

Jeff Sommers

Chief Financial Officer

Career chronology

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to Jeff Sommers individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Finance profile and completed funding

2025–2026 · issuer reported · medium materiality

Cyprium announced Sommers as CFO on 27 June 2025. It reported completing an A$80 million capital raise by the December 2025 quarter and later announced up to A$83 million of debt and equity funding, some conditional, after the September 2026 quarter.

Attribution: Role overlaps event; causation unproven. The evidence records company-level outcomes during the role; individual causation or blame has not been established.

Relevance: Relevant to liquidity and finance oversight; the announced conditional funding is not treated as fully received.

Cyprium bolsters senior leadership team (Page 1); December 2025 quarterly activities (Page 1, highlights); September 2026 quarterly activities (Page 1, funding package footnote)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

The issuer reports prior finance roles at Folium and other corporations, relevant to funding and reporting, but individual financial outcomes and qualification verification remain limited.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Cyprium bolsters senior leadership team (Page 1, Sommers)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

  • The issuer reports a Wisconsin accountancy masters and CPA designation; independent award and membership verification was not obtained.

Richard Holmes

Chief Development Officer

Current
Full background report for Richard Holmes
Personal SuccessIssuer Reported · Medium materiality

Sandfire exploration leadership and competent-person work

Sandfire’s 2022 annual report identifies Holmes as Executive Growth, accountable for growth through partnering and acquisitions. Cyprium reports he previously headed exploration and growth at OZ Minerals and was involved in the Jericho copper discovery; it does not independently apportion that discovery to him.

Individual involvement documented · The former and current issuers document his exploration leadership and reported involvement, not sole credit for the discovery.

Sandfire annual report 2022 · Leadership page, Richard Holmes
Executive appointment · Page 1, prior experience
SafetyDocumented · Medium materiality

Sandfire DeGrussa injury and company prosecution

WA WorkSafe reports Sandfire was fined A$551,250 in November 2023 after pleading guilty to a safety breach arising from a May 2020 DeGrussa underground rockfall that injured a worker. A July 2021 Sandfire release says Holmes had recently joined as Head of Exploration, but does not establish his exact start date; his tenure overlap with the injury is therefore unknown. Sandfire’s 2022 annual report identifies him in an exploration and growth role.

Employer context; no individual link established · The available sources do not establish when Holmes joined relative to the May 2020 injury, any operational responsibility, or personal involvement. The criminal conviction applies to the company.

Sandfire fined after worker injured underground · Government news story, 16 November 2023
Sandfire annual report 2022 · Leadership page, Richard Holmes
Strategic growth plan and senior appointments · Page 4, key management appointments
Evidence gaps · 3
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.
  • Sandfire described geological qualifications, but independent academic confirmation and exact Sandfire departure date remain unverified.
  • Holmes’s exact Sandfire start date and whether his tenure overlapped the May 2020 DeGrussa injury remain unverified; the July 2021 announcement only says he had recently joined.

Full background report

Richard Holmes

Chief Development Officer

Career chronology

  • Current role; start date not stated in selected roster: Cyprium Metals Limited — Chief Development Officer. Diggers & Dealers Presentation (Slide 17, board and management; 4 August 2026)

  • Immediately prior to joining Cyprium in April 2026: Sandfire Resources — Chief Development Officer. Executive appointment (Page 1, prior Sandfire role)

  • By FY2022 to FY2024; exact start and exit dates not established: Sandfire Resources — Chief Development Officer; formerly Executive Growth. Sandfire annual report 2022 (Leadership profiles, Richard Holmes)

Personal achievements

Sandfire exploration leadership and competent-person work

2022–2026 · issuer reported · medium materiality

Sandfire’s 2022 annual report identifies Holmes as Executive Growth, accountable for growth through partnering and acquisitions. Cyprium reports he previously headed exploration and growth at OZ Minerals and was involved in the Jericho copper discovery; it does not independently apportion that discovery to him.

Attribution: Individual involvement documented. The former and current issuers document his exploration leadership and reported involvement, not sole credit for the discovery.

Relevance: Experience directly relates to Cyprium’s exploration and development mandate.

Sandfire annual report 2022 (Leadership page, Richard Holmes); Executive appointment (Page 1, prior experience)

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to Richard Holmes individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Industrial safety

Sandfire DeGrussa injury and company prosecution

2020 incident; 2023 sentencing · documented · medium materiality

WA WorkSafe reports Sandfire was fined A$551,250 in November 2023 after pleading guilty to a safety breach arising from a May 2020 DeGrussa underground rockfall that injured a worker. A July 2021 Sandfire release says Holmes had recently joined as Head of Exploration, but does not establish his exact start date; his tenure overlap with the injury is therefore unknown. Sandfire’s 2022 annual report identifies him in an exploration and growth role.

Attribution: Employer context; no individual link established. The available sources do not establish when Holmes joined relative to the May 2020 injury, any operational responsibility, or personal involvement. The criminal conviction applies to the company.

Relevance: Company safety context only, with no inference of individual wrongdoing.

Sandfire fined after worker injured underground (Government news story, 16 November 2023); Sandfire annual report 2022 (Leadership page, Richard Holmes); Strategic growth plan and senior appointments (Page 4, key management appointments)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

Former Sandfire growth and OZ Minerals exploration roles are relevant to development, while independent attribution of exploration success remains limited.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Executive appointment (Page 1, Holmes)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

  • Sandfire described geological qualifications, but independent academic confirmation and exact Sandfire departure date remain unverified.

  • Holmes’s exact Sandfire start date and whether his tenure overlapped the May 2020 DeGrussa injury remain unverified; the July 2021 announcement only says he had recently joined.

Christofer Catania

Chief Technical Officer

Current
Full background report for Christofer Catania
Personal SuccessDocumented · Medium materiality

Named competent person for Nifty study

The November 2024 Nifty pre-feasibility report identifies Catania, then MEC CEO, as the competent person who compiled the study and ore-reserve information. This establishes a documented technical-reporting role, not proof the forecast mine economics or later operation were achieved.

Individual involvement documented · His signed statement connects him directly to the study information; study outcomes remain prospective.

Nifty copper complex pre-feasibility study · Appendix, statement of JORC compliance page 1
Evidence gaps · 1
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

Full background report

Christofer Catania

Chief Technical Officer

Career chronology

  • Current role; start date not stated in selected roster: Cyprium Metals Limited — Chief Technical Officer. Diggers & Dealers Presentation (Slide 17, board and management; 4 August 2026)

  • Previous role; exact dates not established: Worley — Senior Vice President, Global Resources. Key management team (Christofer Catania biography)

  • Previous role; exact dates not established: KAZ Minerals — Chief Engineer. Key management team (Christofer Catania biography)

  • At 21 November 2024; exact tenure dates not independently established: MEC Mining — Chief Executive Officer, Nifty study competent person. Nifty copper complex pre-feasibility study (Appendix, statement of JORC compliance page 1)

Education and qualifications

University MBA

Published article; date not stated · documented · low materiality

The University of Queensland identifies Catania as an MBA alumnus. The Nifty study also reports a mining engineering degree; the university page supports the MBA, not independent verification of the mining degree.

Attribution: Responsibility not applicable. The university alumni identification supports the MBA; no graduation date is disclosed.

Relevance: Formal management education and mining-specific qualifications are relevant to technical leadership.

Daily habits of successful CEOs (Profile caption and business-school article); Nifty copper complex pre-feasibility study (Statement of JORC compliance page 1)

Personal achievements

Named competent person for Nifty study

2024 · documented · medium materiality

The November 2024 Nifty pre-feasibility report identifies Catania, then MEC CEO, as the competent person who compiled the study and ore-reserve information. This establishes a documented technical-reporting role, not proof the forecast mine economics or later operation were achieved.

Attribution: Individual involvement documented. His signed statement connects him directly to the study information; study outcomes remain prospective.

Relevance: Relevant technical familiarity with Nifty and reserves reporting.

Nifty copper complex pre-feasibility study (Appendix, statement of JORC compliance page 1)

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to Christofer Catania individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

His signed Nifty competent-person study and engineering background provide directly relevant technical experience; study projections are not production outcomes.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Nifty copper complex pre-feasibility study (Statement of JORC compliance page 1)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

Angus Miles

Corporate Development & Investor Relations

Current
Full background report for Angus Miles

No supported material findings selected. See this executive’s report and evidence gaps.

Evidence gaps · 1
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

Full background report

Angus Miles

Corporate Development & Investor Relations

Career chronology

  • Current role; start date not stated in selected roster: Cyprium Metals Limited — Corporate Development & Investor Relations. Diggers & Dealers Presentation (Slide 17, board and management; 4 August 2026)

  • Previous role; exact dates not established: GreenTech Metals — Corporate development and investor relations. Cyprium bolsters senior leadership team (Page 1, executive appointments)

  • Previous roles; exact dates not established: Azure Capital and EY — Capital markets and transaction roles. Cyprium bolsters senior leadership team (Page 1, executive appointments)

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to Angus Miles individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

The issuer reports advisory and corporate-development roles at Azure, EY and GreenTech, relevant to financing and investor relations, but dates and individual transaction outcomes are incomplete.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Cyprium bolsters senior leadership team (Page 1, Miles)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

Justin de Mellion

General Manager Nifty (issuer spelling: Justin de Meillon)

Current
Full background report for Justin de Mellion
SafetyIssuer Reported · Medium materiality

Nifty safety and earlier Tanami role

Cyprium reported one recordable injury and no lost-time injuries for FY2026, and no lost-time injuries since construction began as at its 30 October 2026 quarterly. A 2025 conference programme identifies de Meillon as Newmont Tanami general manager; direct personal contribution to the Nifty safety results is not established.

Role overlaps event; causation unproven · The evidence records company-level outcomes during the role; individual causation or blame has not been established.

2026 annual report · Printed page 14, health and safety performance
Mining the Territory 2025 programme · 2025 programme, speakers and presentation
SafetyDocumented · Medium materiality

Former employer Tanami fatality

Newmont confirmed a worker died on 4 February 2026 at Tanami; operations were suspended and NT WorkSafe and police investigated. Newmont later said the incident occurred at the Tanami Expansion project and authorities were still investigating when its 2025 sustainability report was published in 2026. De Meillon was named Tanami general manager in a 2025 conference programme and joined Cyprium during the March 2026 quarter, but the exact dates of his departure and the event-to-tenure overlap have not been established.

Employer context; no individual link established · His 2025 Tanami role is documented but his status on 4 February 2026, responsibility for the expansion project, and any personal causation are unverified. The fatality alone is not evidence of individual fault.

Mining the Territory 2025 programme · 2025 programme, speakers
Media statement: Tanami incident · 5 February 2026 media statement
Worker death at Tanami gold mine under investigation · 5 February 2026, report of NT WorkSafe inquiry
Newmont 2025 sustainability report · Health and safety section, ongoing investigation
March 2026 quarterly activities · Printed page 10, March-quarter appointment
Evidence gaps · 3
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.
  • Exact Tanami departure date and role at the time of the 4 February 2026 fatality remain unknown. The final NT WorkSafe and coronial investigation outcomes were not located in the sources reviewed.
  • The selected V8 ledger spells the surname de Mellion, while issuer and external Tanami materials use de Meillon; employer and role support the match. Exact Nifty commencement date is not established.

Full background report

Justin de Mellion

General Manager Nifty (issuer spelling: Justin de Meillon)

Career chronology

  • Current role; start date not stated in selected roster: Cyprium Metals Limited — General Manager Nifty. Diggers & Dealers Presentation (Slide 17, board and management; 4 August 2026)

  • Reported as general manager in 2025; exact start and end dates not confirmed: Newmont Tanami — General Manager, Tanami. Mining the Territory 2025 programme (2025 programme, speakers and presentation)

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to Justin de Mellion individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Industrial safety

Nifty safety and earlier Tanami role

FY2026 to 30 October 2026 · issuer reported · medium materiality

Cyprium reported one recordable injury and no lost-time injuries for FY2026, and no lost-time injuries since construction began as at its 30 October 2026 quarterly. A 2025 conference programme identifies de Meillon as Newmont Tanami general manager; direct personal contribution to the Nifty safety results is not established.

Attribution: Role overlaps event; causation unproven. The evidence records company-level outcomes during the role; individual causation or blame has not been established.

Relevance: Provides operating and safety context for the Nifty site general manager.

2026 annual report (Printed page 14, health and safety performance); September 2026 quarterly activities (Page 1, highlights); Mining the Territory 2025 programme (2025 programme, speakers and presentation)

Former employer Tanami fatality

2025–2026 · documented · medium materiality

Newmont confirmed a worker died on 4 February 2026 at Tanami; operations were suspended and NT WorkSafe and police investigated. Newmont later said the incident occurred at the Tanami Expansion project and authorities were still investigating when its 2025 sustainability report was published in 2026. De Meillon was named Tanami general manager in a 2025 conference programme and joined Cyprium during the March 2026 quarter, but the exact dates of his departure and the event-to-tenure overlap have not been established.

Attribution: Employer context; no individual link established. His 2025 Tanami role is documented but his status on 4 February 2026, responsibility for the expansion project, and any personal causation are unverified. The fatality alone is not evidence of individual fault.

Relevance: Relevant prior-employer safety context for a current site operations role.

Mining the Territory 2025 programme (2025 programme, speakers); Media statement: Tanami incident (5 February 2026 media statement); Worker death at Tanami gold mine under investigation (5 February 2026, report of NT WorkSafe inquiry); Newmont 2025 sustainability report (Health and safety section, ongoing investigation); March 2026 quarterly activities (Printed page 10, March-quarter appointment)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

His prior Tanami general-manager role is relevant to Nifty operations; his exact departure and any overlap with the 2026 fatality remain unknown.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Mining the Territory 2025 programme (Speakers programme)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

  • Exact Tanami departure date and role at the time of the 4 February 2026 fatality remain unknown. The final NT WorkSafe and coronial investigation outcomes were not located in the sources reviewed.

  • The selected V8 ledger spells the surname de Mellion, while issuer and external Tanami materials use de Meillon; employer and role support the match. Exact Nifty commencement date is not established.

David Hwang

Company Secretary

Current
Full background report for David Hwang
GovernanceDocumented · Medium materiality

Company secretary and practice status

Cyprium appointed Hwang company secretary effective 12 October 2023. A professional directory describes him as Confidant Partners managing director and reports a NSW practice-certificate check in May 2026.

Individual involvement documented · Appointment is documented by the issuer; practice status is reported by a third-party directory rather than separately confirmed with the regulator in this review.

David Hwang profile and practice certificate · Practice certificate and career profile
Evidence gaps · 1
  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.

Full background report

David Hwang

Company Secretary

Career chronology

Contributions and company outcomes

Acid commissioning of Nifty heaps

2026-09-14 · issuer reported · medium materiality

The issuer reported acid commissioning of nifty heaps: commenced. This records an employer-level event; the reviewed evidence does not attribute the event to David Hwang individually.

Attribution: Role overlaps event; causation unproven. The event occurred at the issuer level during the documented period; no source establishes this executive’s individual contribution or causal responsibility.

Relevance: Context for delivery and oversight in the current role; do not treat it as personal performance evidence.

Operations Update - Phase 1 Cathode Restart Project (page 1, Highlights and page 3)

Governance and interests

Company secretary and practice status

2023–2026 · documented · medium materiality

Cyprium appointed Hwang company secretary effective 12 October 2023. A professional directory describes him as Confidant Partners managing director and reports a NSW practice-certificate check in May 2026.

Attribution: Individual involvement documented. Appointment is documented by the issuer; practice status is reported by a third-party directory rather than separately confirmed with the regulator in this review.

Relevance: Relevant to corporate governance and disclosure responsibilities.

Management update and change of company secretary (Page 1, appointment); David Hwang profile and practice certificate (Practice certificate and career profile)

Suitability for the current role

Role fit based on documented experience

As of 2026-10-31 · analyst inference · low materiality

The documented company-secretary appointment and reported corporate legal work are relevant to governance, with credentials subject to the stated evidence limits.

Attribution: Responsibility not applicable. This is an evidence-limited analyst judgment, not an adverse claim about the executive.

Relevance: Role-specific experience and credentials are central to assessing the current position; the available record is insufficient for a positive or negative conclusion.

Management update and change of company secretary (Page 1, appointment)

Evidence gaps

  • Prior-employer dates and personal contribution to company outcomes are incompletely corroborated. Searches are screening-level and do not constitute court, sanctions or criminal clearance.