Virtual exchange (VE) is an umbrella term used to refer to the engagement of groups of students in sustained online intercultural interaction and collaboration with international partners under the guidance of their teachers. In the computer-assisted language learning literature, telecollaboration and eTandem approaches to VE have been researched extensively. However, this research has principally focused to date on learner gains and the impact on teachers has been much less explored. This paper identifies the impact of VE on foreign language teachers' practices and their professional development by examining the results of a qualitative study of 31 teacher trainers who engaged their classes in VE projects as part of a large-scale European project. The findings of the study suggest that participation in VE projects provides teachers with valuable experience in continued professional development and methodological innovation. In particular, VE was seen to open up opportunities for teachers to develop new professional partnerships, collaborative academic initiatives, to develop their own online collaboration skills, and also to introduce more innovative approaches in their current teaching practice.