Vjekoslav Brajdić was born in 1925 in Skrad. He graduated from the Faculty of Natural Sciences and Mathematics (mineralogy and chemistry group) in Zagreb.
His first job was as curator in the Mineralogical-Petrographic Museum in Zagreb, later renamed the Croatian Natural History Museum. He worked in the positions of curator, director and museum adviser. He also worked as assistant at the chemistry chair in the Faculty of Natural Sciences and Mathematics.
He spent a lot of time in the field, and researched into the intrusive rocks of the western part of Papuk, the gabbro-pegmatites in the surroundings of Olovo (Bosnia and Herzegovina), basalt by Žutina not far from Krapina, volcanic rocks in the village of Dejane by Vlasotnica, eruptive and pyroclastic rocks from the area of Vudelj and the Bistrica brook on the N slopes of Ivanščica and Strahinjčica. He most often published his works in the Geological Vjesnik, the Glasnik of the Natural History Museum, the News of Museum Officers and Conservators, and Informatica Museologica. He wrote about the mineral barićit, named after Ljudevit Barić. He wrote articles for the Croatian biographical lexicon about Ljudevit Barić, Stjepan Bahun and Bogdan Babić. For his work, he was honoured by the Croatian Natural History Association.

NB. Data taken from the questionnaire, material taken from the Personnel Archives of the MDC, and from an interview recorded on February 21, 2002.