Simon Keller works on topics in ethics and political philosophy, and the philosophy of mental health and mental disorder. He has published extensively on issues concerning special relationships, including friendship, family relationships, love, and patriotism. He began work at Victoria University of Wellington in 2009, after previously teaching at Boston University and the University of Melbourne. He has also held visiting positions at Harvard University, Rice University, and Ludwig Maximillian University Munich. His book 'The Limits of Loyalty' won the American Philosophical Association Book Prize in 2009; and his article 'Fiduciary Duties and Moral Blackmail' won the Journal of Applied Philosophy Essay Prize in 2019.