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2026-11-06

← ARU management

Full background report

Angela Bigg

Chief Financial Officer

Career chronology

Industrial safety

Diavik corporate safety plea overlapped Bigg's tenure; no personal link established

2020 incident; corporate plea reported 2022-12-06 · documented · medium materiality

The Northwest Territories and Nunavut safety regulator reported that Diavik Diamond Mines Inc. pleaded guilty to an offence related to a worker seriously injured by rock in November 2020 and was fined. The release also describes charges against the corporation and certain site roles; it does not identify Bigg as charged or personally responsible. She held senior Diavik finance/operations roles during the broader period, including VP Finance, but the event is recorded as employer/role-overlap context only.

Attribution: Role overlaps event; causation unproven. The regulator release identifies the corporate plea and site-level proceedings, not Bigg. No personal causal or supervisory responsibility is established.

Relevance: Relevant only as safety-governance context from a former employer during her senior tenure; it is not a personal safety finding.

Diavik Diamond Mines guilty plea and fine following 2020 rock incident (Regulator release; 16 November 2020 incident and corporate plea/fine); First female president appointed for Diavik Diamond Mine (Career; Diavik finance and operations roles)

Environmental record

Diavik reported a contained mine-water pipeline leak during Bigg's President/COO tenure

February–March 2023 · documented · low materiality

GNWT reported a February 2023 pipeline leak of approximately 450,000 cubic metres of mine-impacted water into Diavik's containment pond. The government said the water was fully contained and no release to the environment occurred; it required repairs and said the company's response was appropriate. Bigg was then President/COO. The event is role-overlap context and does not establish personal responsibility or an environmental enforcement finding against her.

Attribution: Role overlaps event; causation unproven. The government describes a company infrastructure incident and response; it does not attribute personal cause or breach to Bigg.

Relevance: Relevant as limited environmental-control context during her former employer tenure; the containment outcome and lack of personal attribution are material.

Large spill within Diavik containment pond, no release to environment (GNWT release; volume, containment, no environmental release and response); First female president appointed for Diavik Diamond Mine (President/COO tenure)

Suitability for the current role

Finance and mine-operations experience is relevant to the CFO role

2021–2026 · analyst inference · medium materiality

Rio Tinto describes Bigg's progression through Diavik finance and operations roles before becoming President/COO, and Arafura appointed her CFO effective 31 August 2026. This is relevant cross-functional experience, but the appointment is recent and no post-appointment audited finance outcome is yet attributable to her.

Attribution: Responsibility not applicable. This is a role-fit assessment; it makes no claim about personal responsibility for employer incidents.

Relevance: Relevant to project-finance, controls and construction-readiness responsibilities at Arafura.

First female president appointed for Diavik Diamond Mine (Career and President/COO role); Chief Financial Officer Transition (Page 1; CFO effective date); Arafura Rare Earths 2026 Annual Report (Leadership transition and company finance context)

Evidence gaps

  • The 8 July CFO announcement PDF was recovered through the issuer/ASX document gateway after the metadata API did not return a usable file; the downloaded ASX PDF identifier is 03108979 and the cited source was read.

  • No reliable education or professional-membership evidence was located in the reviewed primary sources.

  • A 2023 injury event at Diavik was reported in secondary news but no primary court/regulator source was reviewed, so it is excluded from material findings.

  • Diavik employer events overlap senior roles but do not establish personal responsibility; no comprehensive litigation or adverse-record check was performed.

  • Arafura CFO tenure at cutoff was about two months, too short for an audited personal delivery assessment.