The literature on workplace learning in secondary education has mainly focussed on vocational education programmes. In this study, we examine the impact of internship experience in secondary education on a student's schooling and early labour market outcomes, by analysing unique, longitudinal data from Belgium. To control for unobserved heterogeneity, we model sequential outcomes by means of a dynamic discrete choice model. In line with the literature on vocational education programmes, we find that internship experience has a positive effect on labour market outcomes that diminishes over time, although within the time window of our study, we find no evidence for a null or negative effect over time.