<p>This longitudinal study examines the impact of sex-based and sexual orientation-based victimization on training discontinuity among students in the Swiss Vocational Education and Training (VET) system. Drawing on a representative cohort of 1370 first-year apprentices enrolled in six vocational training centers in the canton of Geneva, data were collected across three waves (2020–2023). Experienced violence was measured at three time points, and training discontinuity was defined as absence from class registers in the subsequent academic year (T + 1). Logistic regression models were estimated on 15 multiply imputed datasets to address missing data. Results indicate that experiencing sexual orientation-based violence at the beginning of the apprenticeship (T1) significantly increases the likelihood of training discontinuity at T2, even after controlling for assigned sex, the sex-typing of training fields, and concealment of sexual orientation. In contrast, sex-based violence was not significantly associated with training discontinuity in the following year, and sexual orientation-based violence measured at T2 was not significantly associated with training discontinuity at T3. These findings suggest that early experiences of sexual orientation-based victimization may disrupt persistence in VET. They underscore the importance of developing inclusive prevention and support strategies aimed at protecting apprentices from sexual orientation-based victimization, with the goal of reducing training discontinuity.</p>