Professor Lapin has been Senior Scientist in Meteorology and Climatology and Professor in Physics of the Comenius University in Bratislava. Between 1971 and 1996 he was employed with the Slovak Hydrometeorological Institute. Since 1996 he has been lecturing Meteorology and Climatology at the Comenius University, focusing on physical basis of the Earth climate system and climate change theory. In 1993 – 2001 he was active as the President of the Slovak National Climate Program. He published more than 200 papers and there are more than 180 ISI quotations of his works in the WOS database. He collaborated with the IPCC at reviewing of the TAR (2001) and AR4 (2007) reports.