He started formal studies at the Storyville jazz club and attended the music program at Molde videregående skole.

His thesis was on joik and jazz, in addition to preparing the orchestral work A Sacred Narrative, which was performed in Kong Haakon Kirke, the Norwegian Seamen's Church in Copenhagen (2007).

Herskedal plays in several bands, such as City Stories, Listen, including Bendik Giske (saxophone) and Espen Berg piano (established in 2002), Magic Pocket, Trondheim Jazz Orchestra, and Jens Carelius.

In Quintus Big Band (established in 2007) he collaborated with Bendik Giske (saxophone), Kristoffer Lo (tuba), Ingrid Bergene Fosaa (horn), Morten Schrøder and Bjørn Erik Heggli (trumpet), Frode Fjellheim and Stian Lundberg (percussion), and Elisabeth Fossan (trombone).

The quartet Bat Band includes Hayden Powell (trumpet), Steinar Nickelsen (organ) and Lasse Ehn (drums).