Mattias is a multi-instrumentalist originally from northern Sweden. He has toured the world with artists such as Johnossi, Miike Snow, Markus Krunegård, Love Antell, Kriget and NONONO. Mattias has also played on numerous records with a variety of artists such as Teddybears, Petter, Zara Larsson, Anna Ternheim and Christian Waltz.

As part of the band Johnossi, Mattias writes and produces Johnossis music along with the other two members. Alongside the touring, Mattias also runs a music studio together with John Engelbert where he works with various artists and projects. As a songwriter, musician and producer.