At Princeton, Cosim has been head preceptor for the introductory sequence of courses in analytic philosophy -- Logic, Moral Philosophy, Metaphysics and Epistemology. In Spring 2023, he taught Systematic Ethics with Michael Smith.

As a grad student, Cosim taught Bioethics, Informal Logic and Probability, Introduction to American Government, Philosophy of Law, and Western Civilization. 

Cosim is not teaching during the Fall 2023 term; he's visiting fellow at the Rutgers Institute for Law and Philosophy.