The MET Engage workshop on 9 September 2021 will explore the MET topics requiring future research, development or community collaboration. The workshop will start with the panel discussing the MET topics requiring future developments from the scientific or technical point of view, intertwining suggestions from the audience. The following panel will discuss the paths and time need to cross from the basic research to implementation, and how these can be improved. We conclude the workshop with the participants being invited to help us define the elements needed in the future to facilitate the research, collaboration and shortening the time of the innovation pipeline for MET and ENV topics. The discussion will draw on a poll taken in advance of the workshop - what research infrastructure and future research can we already propose for SESAR 3, for example?