# Angela Bigg Chief Financial Officer ## Career chronology - **CFO effective 31 August 2026; current at cutoff: Arafura Rare Earths Limited** — Chief Financial Officer. [Chief Financial Officer Transition]() (Page 1; CFO effective date); [Arafura Rare Earths 2026 Annual Report]() (Leadership transition / finance section) - **Appointed President/COO in 2021; left the role in December 2023 after approximately six years at Diavik; prior exact titles not fully dated: Rio Tinto / Diavik Diamond Mine** — President and Chief Operating Officer. [First female president appointed for Diavik Diamond Mine]() (President/COO appointment and Diavik tenure); [First female president appointed for Diavik Diamond Mine]() (Prior finance and operations roles at Diavik) - **Rio career began in 2005; detailed role dates not disclosed in reviewed source: Rio Tinto** — Roles across Mozambique, South Africa and Australia. [First female president appointed for Diavik Diamond Mine]() (Career summary) ## Industrial safety ### Diavik corporate safety plea overlapped Bigg's tenure; no personal link established [aru_bigg_diavik_safety_2020] 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 [aru_bigg_diavik_spill_2023] 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 [aru_bigg_role_fit] 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.