In the mid-1960s, Hiseman played in sessions such as the early
Arthur Brown single, "Devil's Grip". He was in a band humorously named the "Wes Minster Five", and, with
Neil Ardley, helped found the
New Jazz Orchestra. and also played for a brief spell with
Georgie Fame and the Blue Flames. In 1964,
Melody Maker magazine wrote his name as "Jon", and he decided to adopt that spelling. Colosseum disbanded in November 1971, although Hiseman later formed
Colosseum II with
Don Airey and
Gary Moore in 1975. In 2017 Hiseman formed a new trio band called JCM with guitarist/vocalist
Clem Clempson and bass player/vocalist
Mark Clarke. The band recorded an album
Heroes late in 2017 which was released in April 2018. JCM began touring on 7 April. ==Personal life and death==