Shawn Caza served as a Canadian diplomat from 1997 to 2019. He traveled extensively for work and was posted to Europe several times. His collection of Roman coins and antiquities, as well as Seleucid, Ptolemaic, Judaean, Nabataean, Byzantine, Islamic, Indian, Vietnamese and Chinese coins was mainly acquired during travel and postings. He is a member of the American Numismatic Society. He is a Procurator Monetae and a Tribunus Plebis Perpetuus (member of the year 2016 & 2020, and for life) on Forum's Classical Numismatic Discussion. He is also the author of "A Handbook of Late Roman Bronze Coin Types, 324-395" (Spink 2021), and an associate editor of "KOINON: The International Journal of Classical Numismatic Studies."