# Bryn Vaughan Executive General Manager HSSEQT ## Career chronology - **Joined Decmil in June 2019; joined Macmahon on its 2024 acquisition and became EGM HSSEQT in December 2025; previously senior safety roles at CPB.: Macmahon Holdings Limited** — Executive General Manager HSSEQT. [Annual Report FY2026]() (physical PDF p. 43, executive biography) - **Before Macmahon acquisition in August 2024: Decmil Group Limited** — Group HSES manager. [Decmil Annual Report 2023]() (pp. 24–25 management biographies); [Acquisition of Decmil completed]() (p. 1 acquisition completion) ## Education and qualifications ### Qualifications and verification [mah_vaughan_education] Education dates not established · issuer reported · low materiality The issuer reports a Masters degree in occupational health and safety; independent university verification is unavailable. **Attribution:** Responsibility not applicable. Issuer or professional biography reports qualifications; no direct independent verification is implied. **Relevance:** Relevant to assessing professional preparation. [Annual Report FY2026]() (physical PDF p. 43, executive biography) ## Business failures and setbacks ### Decmil prior financial setbacks [mah_vaughan_decmil_loss] FY2022–August 2024 · documented · medium materiality The Decmil scheme booklet’s independent expert reports company net losses of A$1.8m in FY2023 and A$1.8m in the half year to December 2023, following a A$103.2m loss in FY2022. Macmahon completed its acquisition of Decmil in August 2024. The FY2022 loss preceded Baddock and Barnes joining Decmil; Vaughan joined in 2019. These are company-level outcomes. **Attribution:** Role overlaps event; causation unproven. Executive roles overlapped some reported periods; the sources do not establish an individual causal contribution. **Relevance:** Relevant to management of civil contracting and integration. [Decmil scheme booklet independent expert]() (independent expert section 5.6.1 financial history); [Decmil Annual Report 2023]() (printed pp.24–25 management biographies); [Acquisition of Decmil completed]() (p.1 completed acquisition) ## Industrial safety ### Fosterville fatality and ongoing investigation [mah_vaughan_safety] December 2025–October 2026 · documented · high materiality A Macmahon employee died in a 5 December 2025 underground event at Fosterville. The chair said at the 23 October 2026 AGM that investigations were ongoing. The issuer reported FY2026 TRIFR 1.98 versus 2.99 in FY2025; this metric does not offset the fatality. **Attribution:** Employer context; no individual link established. The issuer says he became group HSSEQT head in December 2025 but the day is unconfirmed; role overlap with the 5 December fatality and personal responsibility are not established. **Relevance:** Material to oversight of workplace safety. [Underground mine event]() (5 December 2025 company statement); [FY2026 AGM transcript]() (chair remarks on Fosterville and ongoing investigation); [Annual Report FY2026]() (physical PDF p.18 CEO safety and FY2026 rates) ## Suitability for the current role ### Role-relevant professional experience [mah_vaughan_role_fit] Through 2026-10-31 · analyst inference · low materiality As an analytical inference, the reported experience is relevant to executive general manager hsseqt: Joined Decmil in June 2019; joined Macmahon on its 2024 acquisition and became EGM HSSEQT in December 2025; previously senior safety roles at CPB. The degree of individual contribution to past company outcomes is not established. **Attribution:** Responsibility not applicable. Analytical assessment based on disclosed career; it is not a finding of personal delivery or misconduct. **Relevance:** Matches documented experience to the role. [Annual Report FY2026]() (physical PDF p. 43, executive biography) ## Evidence gaps - Independent verification of education, credential status, full prior-employer tenures and individual outcomes is incomplete. - Focused public-source screening is not a comprehensive court, regulatory, criminal, sanctions or credential check; some historical employer records and local-language sources were not reviewed. - The completed Fosterville investigation, cause and individual responsibilities were unavailable through the cutoff. - Whether his December 2025 HSSEQT appointment preceded the 5 December event has not been established.