Daniel qualified as biologist engineer. Managing Director of Bábolna Bioenvironmental Centre Ltd. since 1989. Pest control experience since 1971. Conducted extensive ecological, ethological and resistance tests on the rat population of Budapest. Research and trials to eliminate the reservoir cockroach populations. Since 1977, nominated as special insect and rodent control expert of the Hungarian Ministry of Health and temporary expert of the World Health Organization in rodent control. From 1989 to 1999 general-secretary of the Hungarian Society of Parasitologists following, member of the Board of Directors. Vice-President of the Confederation of European Pest Control Associations (CEPA, Brussels) for two years, and President for another two years. Since 1999 member of the Board of Directors.