A native of Iceland and a graduate from NYU’s Film Program, Oskar started making short films at the age of 13. His feature debut BLACK’S GAME (2012) has become the 2nd highest grossing Icelandic movie in history. His 2nd feature, I REMEMBER YOU, was the overall no. 1 box office hit of 2017 in Iceland.

Oskar directed 3 eps of the ZDF/BBC co-produced TV series TRAPPED that premiered in 2016 and also 2 eps of TRAPPED 2 which aired in 2018. In 2017 Oskar directed all 6 eps of the TV series STELLA BLOMKVIST which has screened worldwide to great audience and critical acclaim. In 2021 Oskar returned as lead director of STELLA BLOMKVIST 2.

Oskar was lead director of the multi-national TV series SANCTUARY starring Josefin Asplund and Matthew Modine, premiering in 2019. In 2020 Oskar directed 3 eps of the 3rd season of RIVIERA starring Julia Stiles, Sky Atlantic’s most successful original series to date.

Premiering theatrically around the world in 2023, OPERATION NAPOLEON starring Vivian Ólafsdóttir, Iain Glen, Jack Fox, Annette Badland, Ólafur Darri Ólafsson and Wotan Wilke Möhring, marked Oskar's 3rd feature.

The crime TV series REYKJAVÍK 112, for which Oskar directed the last 2 eps, premiered in April 2025 and has become the most successful drama in the history of Icelandic streamer Siminn.

In July 2025 Oskar started production of DEATH OF A HORSE, the first Icelandic series for the New8 program (a collaboration between the national broadcasters of all Scandinavian countries, as well as Holland, Belgium and Germany).

Oskar resides in Iceland with his wife and two children, who will either grow up to become respected academics like their mother or great filmmakers like Elia Kazan.