[1] Sket obtained his doctorate at the University of Ljubljana in 1961 and became a research assistant at the former Natural sciences faculty.

Between 1983 and 1985, Sket served as a dean of the Biotechnical faculty, and later, between 1989 and 1991, as the 37th rector of the University of Ljubljana.

[4] While the focus of his research was the cave fauna of the Dinaric karst, he also took part in cave explorations in other areas such as Ecuador, Galapagos islands, Colombia, Crete island, The Philippines, Florida, Bermudas, Kenya and China.

He also served in editorial boards of several scholarly journals and was a subject field editor of the 'megajournal' Zootaxa.

[2] Additionally, he was a foreign member of the Academy of Sciences and Arts of Bosnia and Herzegovina.