Brynn O’Brien

Brynn O’Brien

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Brynn O’Brien is a prominent environmental advocate and co-chief executive of the Australasian Centre for Corporate Responsibility (ACCR), a group that focuses on corporate accountability and responsible investment. O’Brien has been instrumental in challenging companies on their climate commitments and has played a key role in legal actions aiming to hold corporations accountable for their environmental claims. Recently, she was in the news due to the ACCR's unsuccessful lawsuit against Santos, which sought to contest the company's portrayal of itself as a clean energy producer amidst allegations of greenwashing.

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Recent news mentions

ACCR co-chief executive Brynn O’Brien said the court’s decision was disappointing, but the case would pave the way for others to legally challenge corporate net zero claims around the world.

Santos ‘greenwashing’ claims dismissed in historic Federal Court case
The Sydney Morning Herald·AustraliaAustralia· 2026-02-23
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