Marietta worked with filmmakers from around the world (Myanmar, Nepal, Russia, China etc.) at international labs including Sundance, Biennale College – Cinema and 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.