Sonja Kmec is working on women’s history and gender studies, currently on the project “Music and Gender in Luxembourg” (). She is also active in memory studies. She has studied usages of the past (Lieux de mémoire au Luxembourg; Inventing Luxembourg; Dépasser le cadre national des lieux de mémoire) and focused then on material aspects of remembering: monuments and cemeteries as well as rituals. This research led her to examine the impact of migration and cultural and religious pluralization on memory cultures (cemi-hera.org). Another strand of her research are international relations and small nations, using Luxembourg as a case-study. Sonja is a member of the editorial board of the “Revue d’histoire luxembourgeoise Hémecht” () and “Forum für Politik, Gesellschaft und Kultur” ().