She co-edited Contracting-out Welfare Services (2015, Wiley) and The Political Turn in Animal Ethics (2016, Rowman & Littlefield International).
Siobhan O'Sullivan read for a PhD in government and international relations in the Faculty of Economics and Business, University of Sydney, where she was supervised by Lyn Carson.
[6][7] In 2015, her Getting Welfare to Work: Street Level Governance in Australia, the UK and the Netherlands (coauthored with Mark Considine, Jenny M. Lewis and Els Sol) was published with Oxford University Press,[8] and the edited collection Contracting-out Welfare Services: Comparing National Policy Designs for Unemployment Assistance, edited by O'Sullivan and Considine, was published with Wiley.
[9] Another collection, The Political Turn in Animal Ethics, co-edited by O'Sullivan and Robert Garner, was published by Rowman & Littlefield in 2016.
[14] On the website of the University of New South Wales, O'Sullivan was listed as conducting research into "the delivery of contracted employment services in Australia, the UK, and around the world".
In addition to her published work, she contributed to research reports on social services and the welfare state for Australasian and European audiences.
[14][19][20][21] In her Animals, Equality and Democracy, O'Sullivan explored the issue of the unequal treatment of members of different species in contemporary societies.
This internal inconsistency caused by differential visibility is, O'Sullivan argued, not only unjust and morally arbitrary, but also contrary to "the important liberal democratic values of equity and informed public decision making".