The T-MOSAiC workshop took place on June 20th during the Polar 2018 Conference, Davos, Switzerland. The workshop was divided into three main subjects: (1) The links between the MOSAiC and T-MOSAiC programs; (2) The Science Plan, and (3) The Implementation Plan. In this workshop we had the opportunity to hear and discuss several scientific topics that will contribute to the T-MOSAiC scientific goals. Thank you to all the speakers and attendees for these excellent exchanges. We are now on the road to the 3rd T-MOSAiC open workshop, to be held in Ottawa, Canada, on 10 December 2018.