Annabel Brown

Annabel brings more than 25 years of experience working at the intersection of policy, systems change, and social and economic development across Australia and the Asia-Pacific.

She is a skilled facilitator and convener with deep expertise in policy design, research, and learning. She works well in complex territory: leadership, governance, accountability, capability, and the messy middle of organisational change. She is as comfortable at the conceptual end as she is at the delivery end.

Her career spans community development, international development, and senior leadership in the policy sector, most recently as Deputy CEO of the Centre for Policy Development. She has worked with governments at every level, with international development agencies, and with First Nations and Indigenous communities in Australia and globally.

Annabel holds a Masters in International Development from RMIT University and a Bachelor of Arts (Philosophy) from the University of Western Australia.

She lives and works on the lands of the Wurundjeri people of the Kulin Nation.

Charlotte Siddle

Charlotte has spent over a decade working with families and individuals on the growth and development of philanthropy in Australia.

She brings experience from both sides of the philanthropic relationship. At the Paul Ramsay Foundation she worked across communities, place-based initiatives, and sector capability building. She now leads her own family office as CEO of the Siddle Family Office and Executive Director of the Siddle Family Foundation, with a particular focus on supporting young people with wealth to align their investment and philanthropic activity with their values.

Outside her formal roles she works with for-purpose organisations and purpose-driven individuals across the sector.

Charlotte lives and works on Gadigal land in Sydney.

Sarah Callaghan

Sarah works at the intersection of governance, learning, and systems change, helping organisations build the momentum needed to turn their intent into tangible behavioural and cultural change.

She brings more than 20 years of experience designing, delivering, and evaluating initiatives across justice, peacebuilding, governance, and social and economic change in Australia and globally. She has held roles as UN Volunteer in Liberia, embedded Adviser in the Afghan Government, and policy manager with State and Federal Governments, as well as leadership roles in international development and Australian social change consultancies, most recently as Head of Networks and Insights at Collaboration for Impact. Across these contexts she has developed a deep understanding of the practical and conceptual realities of applying learning, partnerships, governance, and working alongside communities.

She is known for sound judgement, honesty about constraints, and a practical focus on moving things forward.

She holds a Bachelor of Laws and a Bachelor of Arts (Anthropology) from the University of Adelaide.

She lives and works on Yugambeh land at the intersection with Bundjalung country on the South East Queensland border.

Theo Taylor

Theo is a PRISM Collective member contributing to administrative coordination, project support and management tasks. He brings a genuine commitment to social change and a growing practice in the for-purpose sector. Theo volunteers and works in his local community and is preparing to study social justice at university level.

Theo lives, works, and learns on Gumbaynggirr Country.

Jessica Desmond

Jess brings more than 15 years of experience in communications, campaigns, and strategy across the public and private sectors.

Her work sits at the intersection of systems change and narrative. At Greenpeace Aotearoa she led campaigns on oceans, plastics, fisheries, and deep sea mining, and ran a Greenpeace International innovation lab exploring how to shift the way people value nature. Before that, she worked in communications at The B Team in New York, supporting a global collective of business and civic leaders on climate, governance, transparency, and human rights.

She is currently undertaking advanced study in Psychology at the University of Auckland, with a focus on social and political applications.

Jess lives and works in Tamaki Makaurau, Aotearoa New Zealand.

Courtney Collins

Courtney is an author, screenwriter, and producer who has been practising Action Learning and facilitating Action Learning Sets for almost twenty years, applying it in learning environments for social entrepreneurs and creative writers. She has taught creative writing in academic and non-academic institutions in Australia and overseas.

She brings a long commitment to storytelling as a driver of social change. She founded Ngukurr Story Projects with local Indigenous artists and storytellers in southeast Arnhem Land, and her creative work spans literary fiction, film, and documentary. Her novels The Burial (Allen & Unwin) and Bird (Hachette) have been published across ten countries and recognised by the Stella Prize, the NSW Premier's Literary Awards, and others. Most recently she wrote and executive produced Life Could Be a Dream, a social impact feature film funded by WeirAnderson Films, The Snow Foundation, Minderoo and the Commonwealth Bank.

She holds a Master of Creative Writing and a PhD examining whiteness in creative literary production.

Courtney lives and works on Gumbaynggirr Country on the Mid North Coast of NSW.