Peter O’Hearn is a Research Scientist at Facebook and a Professor at University College London. Peter has done research in the broad areas of programming languages and verification for over 25 years, having held academic positions at Syracuse University, Queen Mary University of London, and University College London, before joining Facebook in 2013 with the acquisition of the verification startup Monoidics. With John Reynolds Peter devised separation logic, a theory which opened up new practical possibilities for program proof, including the technology which led to the Infer program analyzer developed by Peter’s team at Facebook. Infer runs internally on Facebook’s code bases, detecting over 100,000 bugs which have been fixed by Facebook’s developers in the past five years. Infer is also used in production at number of other companies, including Amazon, Mozilla, Spotify and Marks and Spencer. Peter is a Fellow of the Royal Society, a Fellow of the Royal Academy of Engineering and he has received a number of awards for his work including the 2016 Godel Prize, the 2016 CAV Award and the 2011 and 2019 POPL MIP Awards. Peter received an honorary doctorate from Dalhousie University in 2018.