Kostas Xenarios studied art restoration/ conservation at the studio of the Athenian Technological Institute, under his Italian educated professor Stavros Baltoyannis with emphasis on preservation rather than restoration. Though his schooling was in general conservation, his preference is with the conservation of paintings of all mediums. From 1969 to 1974 he worked for the Greek Ministry of Culture on the Island of Crete, restoring Byzantine frescos and icons in remote monasteries and churches. In 1974 he immigrated to Canada and settled in Toronto where he has been living ever since. He has worked for several galleries and public institutions, including the Royal Ontario Museum and the Historical Board.