The article provides an analytical overview of the four areas of professional work of dr. Božidar Kert at his 90th anniversary. We presented his educational path, careers, research and pedagogical work, as he is one of the founders of the Maribor Geographical Department. Research basis of his bibliographic units, records of four long-time professional collaborators and semi-structured interviews of the celebrator. We also provided the analysis of the existing published and also his personal, unpublished materials.V članku je podan analitični pregled štirih področij profesionalnega dela dr. Božidarja Kerta ob njegovi 90.letnici. Na osnovi njegovih bibliografskih enot, zapisov štirih dolgoletnih sodelavcev ter s pol strukturiranim intervjujem jubilanta, smo v kombinaciji z analizo obstoječih objavljenih in tudi njegovih osebnih, neobjavljenih gradiv predstavili področja izobraževanja, kariere, raziskovanja in pedagoškega dela enega izmed utemeljiteljev mariborskega geografskega oddelka
