[1] Yaroslav Onyshchuk was born on 4 June 1967 in Popivtsi, now the Pidkamin Hromada of Zolochiv Raion, Lviv Oblast, Ukraine.
He worked as the executive secretary of the Brody District Organization of the Ukrainian Society for the Protection of Historical and Cultural Monuments (1991–1992); junior (1992–1994), senior (1993–1998) researcher at the Brody Local History Department of the Lviv Historical Museum.
[1] From 1995 at his Alma Mater: postgraduate student, docent (1999), associate professor (1999), doctoral candidate, chief (2021) of the Department of Archaeology and History of Ancient Civilizations.
[1] Deputy Director of the memorial and search enterprise of the Lviv Regional Council "Dolia".
[1] Monographs: He studied archaeological sites of Roman times in the upper reaches of the rivers Ikva (Dudyn II, Nakvasha I), Styr (Brody I, Sukhovolia I, IV), Seret (Malynyshche I), and Western Bug (Kariv I, XIII).