Isaac Astill
Isaac Astill (born 1993, Adelaide) is an Australian climate change campaigner, movement builder and political strategist who has driven major environmental campaigns. He has worked extensively with the Greens and currently holds the position of Greens SA State Secretary. He was the Bob Brown Young Environmentalist of the Year in 2013 for his efforts in campaigning against proposed coal ports along the Great Barrier Reef.[1][2][3][4]
Climate change campaigning and movement building
Shortly after completing high school, Astill joined the Australian Youth Climate Coalition (AYCC), and was a member of their delegation to the 2011 United Nations Climate Change Conference in Durban, South Africa.
Astill relocated to Queensland to campaign against locally proposed coal ports along the coast of the Great Barrier Reef. In 2013, he received the Bob Brown Young Environmentalist of the Year award. [1][2][5]. Also in 2013, Astill was appointed Head of Communications at Future Super, Australia’s first Super Fund to not invest in fossil fuel companies.
In 2014, Astill coordinated a national network of groups on behalf of 350.org, pushing institutions to divest from the fossil fuel industry. Institutions including the Australian National University, Uniting Church of NSW/ACT and the City of Newcastle ultimately conceded and billions of dollars were divested after campaign pressure. In 2015, Astill joined in blockading Whitehaven Coal's Maules Creek mine project. He said of his actions:
"I want to be able to look the next generation in the eyes and say ‘I did everything I could to stop the fossil fuel industry.’”[6]
Stop Adani campaign
In March of 2017, Astill was instrumental in the foundation of the Stop Adani network, protesting the Carmichael Mine. He stated to ABC news: "It's going to be the biggest coal mine in the southern hemisphere at a time when our climate is crumbling"[7]
The campaign had political wins, pushing the Queensland government to veto a $1 billion loan to Adani.[8]
Astill has campaigned with climate movement group Tipping Point to support the School Strike 4 Climate network, the coordinated protests in September 2019, are believed to be the largest environmental protest in Australia’s history with an estimated 300,000 attendees across 112 cities.[9]
In 2020 Astill joined as a board member of the Nature Conservation Council of NSW, spending 2 years in the state’s peak conservation body.[10]
Political campaigning
In the 2025 Australian federal election, Astill campaigned to elect Sarah Hanson-Young to the Senate. In the 2026 South Australian state election, Astill convened the Sturt branch campaign in Adelaide’s east, achieving a swing to the Greens in all 5 seats: Dunstan, Torrens, Hartley, Morialta and Bragg.[11] Astill is currently State Secretary of the SA Greens.[12]
As of October 2026, Astill has nominated for preselection for the Federal Senate after Senator Barbara Pocock announced she would not be contesting a second term. He stated that:
“It’s time for the Greens to be bold. I will bring fresh ideas to Canberra. We need politicians with proven experience in movement building, so we can grow the Greens vote with new communities.”[13]
“As Greens Senator, I will fight for climate and housing, and use the resources and platform of being a Senator to support and build a Greens movement that can win.”[14]
Personal life
Astill was brought up in Yankalilla, South Australia, where he attended the local area school. He currently resides in Adelaide, South Australia.
References
- ↑ 1.0 1.1 "20-year-old travelled 2400km to protect the Barrier Reef". The Morning Bulletin. Retrieved 2014-06-09.
- ↑ 2.0 2.1 "Former Yankalilla man wins Bob Brown environment award". FLinders News. 2013-07-02. Retrieved 2015-04-12.
- ↑ "2013 Environmentalist of the Year Awards". Retrieved 2015-07-13.
- ↑ "KAFDA campaigner wins award". Rockhampton Morning Bulletin. Retrieved 2015-07-13.
- ↑ "2013 Young Environmentalist of the Year". The Bob Brown Foundation. Retrieved 2015-04-12.
- ↑ "Bat Attack protest continues at controversial Whitehaven owned Maules Creek mine site - Front Line Action on Coal". Retrieved 2015-07-13.
- ↑ https://www.abc.net.au/news/2017-10-08/thousands-protest-adani-mine-across-australia/9026336
- ↑ https://www.theguardian.com/australia-news/2017/dec/12/annastacia-palaszczuk-to-officially-veto-adani-railway-loan-after-swearing-in
- ↑ https://www.nma.gov.au/explore/blog/global-climate-strike
- ↑ https://www.linkedin.com/in/isaacastill
- ↑ https://result.ecsa.sa.gov.au/
- ↑ https://www.indailysa.com.au/news/just-in/2026/09/04/sa-greens-leader-takes-tilt-at-federal-arena
- ↑ https://www.indailysa.com.au/news/just-in/2026/09/04/sa-greens-leader-takes-tilt-at-federal-arena
- ↑ https://isaacastill.com/
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