This document presents over 30 international expertise projects carried out by INRAE expert scientists. The information allowing this publication was collected by the Directorate of Support for Public Policies, one of the two directorates of the Deputy- Directorate-General of Expertise and Support for Public Policies (DGD EAPP). It is the result of: (i) a survey on the different types of expertise (survey carried out in 2019), (ii) feedback from groups of expert scientists in response to this survey, and (iii) a presentation of these projects during two consecutive seminars (September 2018 and July 2019).