Her art projects are collaborative and focus on people joining together in action to protect or develop an aspect of their local commons. Her practice supports sustainable models within various ecological contexts and addresses issues of land use, lost knowledge, social justice and biodiversity. Creative output includes drawings, video, publications, walks and pedagogical exchange.

While resident at studio 468 Seoidin O’Sullivan worked with the Rainbow Neighbourhood Group and was also instrumental in setting up the South Circular Road Community Garden.

She studied Fine Art at Technikon Natal in Durban, South Africa (2000) and she completed the MA in Fine Art (2000), a Post Graduate Diploma in Third Level Teaching and Learning (2010) and in International Development Studies (2004) at The National College of Art & Design in Dublin.