[1] He received his PhD from the Adam Mickiewicz University in Poznań in 1996 with a thesis on the Wielbark culture.
[3][2] Kokowski specializes in the archaeology of Poland in the Pre-Roman Iron Age and the Roman Iron Age, particularly cultures associated with the Goths, Vandals and Sarmatians, on which he has managed numerous projects.
He is a fellow of the Alexander von Humboldt Foundation and the author of hundreds of scientific publications.
[4][5] Between 1980 and 1989 he was registered as a secret collaborator of the Polish Communist Security Service (Służba Bezpieczeństwa), operating under the codename "Wisłok".
He was dealt with by Department II of the Voivodship Headquarters of the Citizens' Militia (Komenda Wojewódzka Milicji Obywatelskiej) / Voivodship Internal Affairs Office (Wojewódzki Urząd Spraw Wewnętrznych) in Lublin.