# Dr Chris Muller Managing Director; Chief Executive Officer ## Career chronology - **Earlier career; exact dates not established: Prior employers as stated in official or reviewed professional profile** — Mining/exploration across PNG and Asia; involved in Morobe Mining JV discoveries and Kora North discovery with K92.. [Leadership]() (Dr Chris Muller profile; career/role section) - **Current role; roster as of 2026-09-26: Tolu Minerals Limited** — Managing Director; Chief Executive Officer. [Leadership]() (Dr Chris Muller profile; title and role); [Tolu Strengthens Executive Leadership Team with Appointment of Warren Uyen as COO]() (Directors’ report / Corporate Directory; executive name and title) - **Joined as Executive Group Geologist in January 2025; appointed MD/CEO in November 2025: Tolu Minerals Limited** — Executive Chief Geologist, then Managing Director and CEO. [Change of Managing Director and CEO]() (Announcement dated 16 September 2025; appointment transition and career profile, PDF p.1); [Leadership]() (Official leadership profile; Dr Chris Muller title) ## Education and qualifications ### Education and professional credentials [chris_muller_education] Credential history; dates not disclosed in reviewed source · issuer reported · low materiality PhD and first-class honours in economic geology. **Attribution:** Individual involvement documented. The profile identifies the stated qualifications; graduation dates and independent register verification were not located. **Relevance:** Relevant to the technical, finance or governance responsibilities described in the current role. [Leadership]() (Dr Chris Muller profile; career/role section) ## Personal achievements ### Relevant professional experience [chris_muller_career_record] Earlier career; exact dates not established in reviewed profile · issuer reported · medium materiality Mining/exploration across PNG and Asia; involved in Morobe Mining JV discoveries and Kora North discovery with K92. **Attribution:** Individual involvement documented. The cited profile describes the person’s roles and involvement; outcome attribution is limited to what it explicitly states. **Relevance:** Provides role-relevant experience; profile claims are issuer-reported and not a substitute for independent delivery evidence. [Leadership]() (Dr Chris Muller profile; career/role section) ### PNG discovery, restart and technical record with verified education [chris_muller_career_and_qualifications_appointment] Career to 2025; Tolu transition September–November 2025 · issuer reported · medium materiality Tolu’s 16 September 2025 appointment announcement says Muller had more than 25 years of global mining and exploration experience, including senior roles in PNG, mine restart work at Simberi and Kainantu, contributions to discoveries at Wafi/Golpu, and Kora North discovery at K92. It says he received a first-class honours degree in economic geology from the University of Tasmania and a PhD from Macquarie University. He joined Tolu as Executive Group Geologist in January 2025 and was appointed MD/CEO after Iain Macpherson’s contract ended in November 2025. These career achievements are issuer-reported; the discovery contribution is specific but shared with the project teams. **Attribution:** Individual involvement documented. The issuer describes Muller’s involvement in the listed discoveries and mine restarts; it does not assign sole credit or independently verify quantified deposit sizes. **Relevance:** Technical discovery and PNG operating experience directly fit geology leadership and restart oversight at Tolukuma. [Change of Managing Director and CEO]() (About Dr Chris Muller; roles, restart/discovery contributions and degrees, PDF p.1); [Change of Managing Director and CEO]() (Appointment timing; MD/CEO succeeds foundation CEO after 9 November 2025, PDF p.1) ## Industrial safety ### Fatal incident reported near Tolukuma [chris_muller_fatality] 6 July 2026 · issuer reported · high materiality Tolu disclosed a fatal incident on exploration licence EL2531 in Papua New Guinea on 6 July 2026. The announcement said the incident occurred near the Tolukuma operation, and the Mineral Resources Authority/Mines Inspectorate were notified. The reviewed evidence does not establish the circumstances, investigation findings, or any individual’s involvement. **Attribution:** Role overlaps event; causation unproven. The event occurred during current executive service, but no source reviewed links this individual to the incident or its causes. No final regulator finding was located by the cutoff. **Relevance:** Safety oversight is central to restart and operating roles; relevance is a question for governance, not a causation finding. [Tolu reports incident on EL2531 resulting in a fatality]() (incident circumstances and notification to regulators) ## Suitability for the current role ### Role fit and evidence limits [chris_muller_role_fit] Assessment at cutoff 2026-10-09 · analyst inference · medium materiality PNG mining and underground operating experience is relevant to Tolukuma restart planning; the mine’s safety and restart execution require current operational evidence. **Attribution:** Responsibility not applicable. This is an analytical inference from the cited career profile and the company’s stated stage; it does not claim personal causation of company outcomes. **Relevance:** Connects prior experience to the role’s execution and oversight needs. [Leadership]() (Dr Chris Muller profile; career/role section) ## Evidence gaps - Exact dates for prior roles and independent confirmation of profile claims were unavailable in the reviewed materials. - The regulator investigation outcome and detailed circumstances of the July 2026 fatal incident were not available in the reviewed pre-cutoff material. - The public issuer announcement provides degree names but no independent confirmation of the award records, and gives no exact employment dates for most prior roles.