International Standard ISCO OIT 2017-05-12 2017-05-12 18:59:56 en Professionals2 Professionals increase the existing stock of knowledge; apply scientific or artistic concepts and theories; teach about the foregoing in a systematic manner; or engage in any combination of these activities. Competent performance in most occupations in this major group requires skills at the fourth ISCO skill level. Profesionales cientÃficos e intelectuales 2017-05-14 13:57:262017-05-14 14:14:02