The majority of the literature in the field of international education focuses on the experiences of international students, while much less is known about how teachers learn to teach this cohort. Research on teachers' informal professional learning and critical moments of growth in their endeavour to enhance the learning experiences of international students in the vocational education and training sector is even scarcer. This article responds to the dearth of existing literature. related to teachers' professional learning in international vocational education. It is based on a study that includes semi-structured interviews with 102 staff in Australian vocational education and training. The article uses positioning theory as a conceptual frame to analyse teachers' narratives of informal professional learning relation to teaching international students. The findings show that teachers position international students as valuable resources contributing to their informal professional development. The study indicates that it is crucial for teachers' on-the-job learning experiences to be factored into the broader policy frameworks concerning teacher professional development. The article provides the evidence base to inform the development of situated and targeted professional learning for teachers teaching international students.