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2026-11-06

← MAH management

Full background report

Simon Barnes

Former Managing Director Civil Infrastructure East

Career chronology

Education and qualifications

Qualifications and verification

Education dates not established · issuer reported · low materiality

Decmil reports a civil engineering qualification and MBA; independent institutional confirmation was 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. 45, executive biography); Decmil Annual Report 2023 (printed p.25 Simon Barnes biography, civil engineer and MBA)

Business failures and setbacks

Decmil prior financial setbacks

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)

Governance and interests

Leadership transition from Decmil East

September–October 2026 · documented · medium materiality

Fulton Hogan announced in September 2026 that Barnes was joining from Decmil East, with an expected start of 12 October; its leadership page says he commenced in October. The exact date he left Macmahon and his replacement are not established.

Attribution: Individual involvement documented. The transition is explicitly disclosed by his new employer; its practical impact on Macmahon is not established.

Relevance: Material to continuity of the civil infrastructure East leadership.

Fulton Hogan appoints Simon Barnes CEO Australia (appointment announcement, former role and planned start); Fulton Hogan appoints new CEO for Australia (3 September 2026 appointment announcement); Our leaders (Australian executive profile, October commencement)

Suitability for the current role

Role-relevant professional experience

Through 2026-10-31 · analyst inference · low materiality

Prior civil engineering and regional contracting leadership is relevant to his former Decmil East role. He joined Fulton Hogan as Australia CEO in October 2026. The sources do not isolate individual contribution to past company outcomes.

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. 45, 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 precise departure date from Macmahon and the identity of his permanent replacement are not established.