This paper describes the method we developed to measure and describe precisely the indirect employment linked to livestock farming. Beside of the assessment of the number of jobs itself, we had to figure out a way to define which jobs were to be considered as indirect employment. That is why we developed an assessment of the economic dependency of each operator, consisting of three components: short term dependency, adaptation abilities and geographical constraints. This allowed us not only to evaluate the total number of indirect jobs depending on the presence of livestock farming in France, but also to describe them precisely.