Introduction: Group interventions in occupational therapy (OT) are widely common in the field of adult mental health. This exploratory study examines which groups are actually offered in Austria, which competences OTs subjectively see in themselves, which further training needs they perceive, and which ideas they have for improving group interventions in their field of work. Method: As the first step in a mixed methods design, a scoping review on the topic of mental health group concepts in OT was conducted. With the aim of an explorative analysis, the answers of 92 OTs from Austria who work in this field of mental health were collected using an online questionnaire. Results: The majority of participants offer a wide variety of group interventions such as arts and crafts, cooking, or cognitive training. Concerning their skillsets, OTs see their strengths in relationship building and communication. Potential for development is perceived, among others, in conflict resolution. OTs wish to be heard more when it comes to decision making about group interventions in their respective places of work, for example concerning the balance of individual or group therapy, and the size of groups. Conclusion: Group interventions are an important tool for OT in mental health. OT students could be better prepared for conflict management and group dynamics in their basic training. Further training on specific group concepts and case discussions is desirable. [ABSTRACT FROM AUTHOR]