Istvan obtained Ph.D. degree from the Hungarian Academy of Sciences (HAS) while studying the fundamentals of acid-base catalysis and developing efficient processes for pharmaceutical, fine chemical and petrochemical industries in the Hungarian Hydrocarbon Institute. Later his research focused on zeolite catalysis, oxide superconductor synthesis, and catalytic fume abatement from mobile and stationary exhausts in the chemical research laboratories of HAS, Technical University of Vienna, Wayne State University in Detroit and University of Iowa. He joined PQ R&D about 21 years ago to characterize the structure and properties of silica based materials. He organized scientific meetings and served in various board positions in scientific organizations, including chairing the Philadelphia Catalysis Club and being president of the North-East Corridor Zeolite Association (NECZA). Edited one book on catalysis, (co)authored ca.120 papers, book chapters and patents, and held 100 conference presentations.