From 1968 to 1972 he attended Gymnasium in Koper.
His main research field is the algebraic graph theory, where he researches the symmetry of graphss and the functionality of finite groups on combinatorial objects. He is the founder of an algebraic graph theory and a theory of permutation groups in Slovenia.
He is a professor at the Pedagogical faculty of the University of Ljubljana.
In 2002 he received the Zois reward for his topmost scientifical achievement in the field of graph theory and algebra.