This article aims to assess whether differences in teacher characteristics vary with differences in socioeconomic compositions of schools. We conducted correlation analyses on administrative data from the French-speaking education system in Belgium. This database regroups more than 20,000 teachers in 1,630 elementary schools. We selected indicators to measure the link between schools' socioeconomic composition and a set of dimensions of teachers' profile such as experience, job security, and stability. The results confirm that some of these dimensions are linked to the school composition. The findings highlight the relevance of considering segmentation of the school market when studying the topic.