Marietta has worked with filmmakers from around the world (Myanmar, Nepal, Philipines, Korea, China etc plus Europe) and at international labs including Sundance, Biennale College Cinema and Locarno Open Doors. She wrote and co-produced the political thriller "Call Girl", and writes for both film and TV (including Netflix). She is a longstanding mentor with Torino Film Lab. She is a Member of the Swedish Drama Union and the European Film Academy, and co-founder of The Write Retreat.