This article presents an analysis of a five-year study on the implementation of a technology-supported distance programme in Swedish firefighter training. Based on activity theory and four interview studies, the attention is directed to firefighter instructors' perceptions and use of digital technologies with a focus on challenges, contradictions and changes. Two phases are identified, viz an implementation phase and a dissemination phase. During the implementation phase a clear contradiction emerges regarding how the object of the training should be interpreted, which results in the instructors responsible for the implementation reconsidering previous beliefs and, with the support of digital technologies, developing more theoretical and process-oriented approaches and improving the course design. However, during the dissemination phase, when all instructors are involved, a number of conflicts and dilemmas emerge, resulting in the changes achieved in the distance programme to some extent being normalised in the direction of the instructor-centred and exercise-oriented approaches of the campus programme. The article concludes with a discussion about contradictions as well as opportunities that may emerge during the implementation process of a vocational technology-supported distance programme.