He was trained in paediatric endocrinology by Professors Herwig Frisch in Vienna, Austria and Jeremy Winter in Edmonton, Canada. He gained his PhD on diagnostic procedures in children with short stature and became professor of paediatrics with inaugural lecture on transcriptional regulation of endocrine system. His current research is focused on molecular aspects of beta-cell disorders, and genetics of short and tall stature. He published over 250 original articles and lectured in over 40 countries worldwide. In 2009-2010, he was the ESPE president and organised the 49th ESPE Annual Meeting in Prague in 2010. Since 2010 to 2016, he was ESPE council member with responsibility for education and training. He was a teacher at numerous training courses worldwide, including ESPE Winter School, ESPE Central Asia and Caucasus School, Joint ASPED-ESPE Academy, ESPE Diabetes Obesity and Metabolism School, APPES courses in Asia-Pacific area and ASPAE teaching courses in sub-Saharan Africa. Since 2021, he serves as ESPE convenor for the sub-Saharan Africa training centres in paediatric endocrinology.