When his band "Montezuma" merged with original founders Chris Von Rohr and Tommy Kiefer in KROKUS, the first album in that formation was released in 1977 as "To You All". Juerg also played bass on the follow-up 1978 release "Painkiller".

When Marc Storace joined KROKUS for the 1980 "Metal Rendez-Vous" release, Juerg rendered bass duties to multi-talented Chris Von Rohr and worked in the background as keyboard player for that album.

He engineered/recorded 1990's album "Stampede" in his own "Pink Sound Studios" in KROKUS' hometown of Solothurn.

Next he recorded and mixed at his "Pink Sound Studios" the 1995 release "To Rock Or Not To Be". He also is noted as producer for the pre-album EP release of "You Ain't Seen Nothing Yet".