About 220 staff members from different European Commission departments are classified as workers occupationally exposed to ionising radiation in the course of their work. Under the European and national radiological protection regulations, the employer is responsible for implementing arrangements for the radiological protection of his workers. The employer shall arrange for precautions and radiation monitoring appropriate to the risks associated with the work involving exposure to ionising radiation. Therefore, the Directorate-General for Energy has established a system for systematic monitoring, recording and reporting of individual radiation exposures. The radiation monitoring also comprises the detection of possible internal exposure with the whole-body counter. An approved laboratory shall provide this special service, which is the subject of this call for tender.