[4] He worked as a firefighter in Kristianstad for three years before film studies at the Valand Academy in Gothenburg.
[1][5] In 2012 he founded the master program Cinematic Processes at the Valand Academy.
[6] Danielson's first feature documentary film Twin Brothers - 53 Scenes in Chronological Order (Pangpangbröder), premiered at the International Film Festival Rotterdam in 2011.
[7] In 2016, he co-directed Ten Meter Tower (Hopptornet), along with Maximilien Van Aertryck, which premiered at the Berlin International Film Festival and was shortlisted for an Academy Award for Best Documentary Short film.
[8][9] In 2023, he co-directed And the King Said, What a Fantastic Machine, together with his long-term collaborator Maximilien Van Aertryck, which premiered at the Sundance Film Festival.