Jeroen Paul Thesseling is a Dutch fretless bass player, most famous for his work in the German progressive death metal band Obscura and the Dutch progressive death metal band Pestilence.

Obscura is a German technical death metal band from Landshut, founded by guitarist and vocalist Steffen Kummerer in 2002. The band have released six studio albums, a compilation album and twelve music videos since its formation. Their latest album A Valediction was released on 19 November 2021 via Nuclear Blast.