Contact details

Role: Stipendiary Lecturer in Philosophy


Dr Stefan Sienkiewicz


I read Literae Humaniores as an undergraduate at Christ Church where I also took an MSt in ancient philosophy. I subsequently moved to Oriel College, where I completed my DPhil in philosophy and taught as a college lecturer. I then spent five years as Career Development Fellow at Balliol College. I am also currently a stipendiary lecturer in philosophy at The Queen's College.

Research interests

My research interests are in ancient philosophy, with a focus to date on Hellenistic epistemology and scepticism.


I teach across the range of ancient philosophy papers as well as General Philosophy and Mill for Prelims and Ethics for Finals.



Five Modes Of Scepticism: Sextus Empiricus and the Agrippan Modes (Oxford: Oxford University Press, 2019)

Articles and book chapters:

‘Proof Against Proof: A Reading of Sextus Empiricus’ Against the Logicians 8.463-481’, Oxford Studies in Ancient Philosophy, 61 (2021) (published 2022)

‘The Sceptic’s Art: Varieties of Expertise in Sextus Empiricus’ in Johansen, T. (ed.) Productive Knowledge in Ancient Philosophy (Cambridge: Cambridge University Press, 2020)