London accountant Buchler was former president of business recovery body R3 and was also co-founder of turnaround firm Kroll, previously called Kroll Buchler Phillips.
Volvere, which floated on AIM last year, was set up as consulting service for the regulated gas, nuclear and rail industries.
It has acquired the lossmaking engineering consultancy, Vectra and the business consulting arm of PFI firm Amey.
Steve Absolom and Will Wright from KPMG Restructuring have been appointed joint administrators to City Motor Holdings and associated companies
Partners from Johnston Carmichael have been appointed as joint administrators to Axon Well Interventions Products UK
Begbies Traynor have been appointed administrators of William Anelay Ltd, York, one of Britain’s longest-established construction and heritage restoration companies
Smith & Williamson has been appointed administrators of charity 4Children