Pietari works in the field of environmental media studies with a focus on media management and production studies. He has published widely in the field of environmental media studies, including Transnational Ecocinemas (Intellect 2013), Ecology and Contemporary Nordic Cinemas (Bloomsbury, 2014), Environmental Management of the Media: Industry, Policy, Practice (Routledge 2018) and Film and Television Production in the Age of Climate Change (Palgrave 2022).
He is PI of the Global Green Media Network, including several co-produced industry reports on sustainable film production management: www.globalgreenmedianetwork.org/reports. He is also Docent (affiliate professor) in Film and Television Studies at the University of Helsinki and Senior Research Fellow at Centre for Creative Arts and Public Value, Education University of Hong Kong.