From 1948 to 1952, Diblík studied architecture and civil engineering at the Technical University of Dr. E. Beneš (now Brno University of Technology). While at school, he began to devote himself to design. He began his work at Karosa Vysoké Mýto, where he collaborated on the design of the Škoda 706 RTO bus. He notably designed the interior of the De Luxe version for Expo 58 in Brussels. Beginning in 1959 he worked at Tatra, where he worked with other designers on the modernisation of the Tatra T-603. When the project was moved to the new Tatra department in Bratislava, he collaborated with that team as well. However, none of his work at Tatra was realised and mass-produced.