Sorum has been playing beach volleyball in national and international tournaments since 2011, starting CEV U18 with Knut-Ludvig Larsen and from 2012 with Bjarne Nikolai Huus, finishing 2nd in the FIVB U19 World Championship.

With Morten Kvamsdal, he had his first top ten finish at the 2016 FIVB World Tour in Fortaleza and was ninth at the European Championships in Biel.

[1] Since the end of July 2016 Sorum plays with Anders Mol, with whom he finished fifth at the FIVB Major in Klagenfurt and won the U22 European Championship in Thessaloniki.

With that win the duo landed their forth FIVB World Tour gold medal in a row and earned them the highest ever prize money in the history of beach volleyball, taking home 150,000 $ in total.

At the 2020 Tokyo Olympics, the pair won gold medals, beating Russians Viacheslav Krasilnikov and Oleg Stoyanovskiy in the final.