His university profile: http://explore.georgetown.edu/people/brownj2/
An article that I came across on Hadith, a transcription of his talk: http://muslimmatters.org/2014/04/25/hadith-between-muslim-conviction-western-criticism-dr-jonathan-brown/1/
He's probably one of, if not the, leading researcher in the field. I always recommend his "Hadith: Muhammad's Legacy" book to people who want an overview of hadith. His dissertation on the Cannonization of Bukhari and Muslim is also a fascinating, albeit dense, read.