In 1882 he was made a drawing teacher at the Henri Daniel Guyot Instituut [nl], the first Dutch school for the deaf, in Groningen, although he had not yet completed his studies.
He painted nineteen portraits of professors for the senaatskamer (board room) in the Academiegebouw (main building) of the University of Groningen.
Bach also painted a number of ceramic tableaux, which were erected in the hall of the main railway station in Groningen in 1896.
Bach died at the age of ninety and was buried in the Roman Catholic cemetery in Groningen under a tombstone of his own design.
The artist Johan Dijkstra [fy; nl] wrote of this: "Being the eccentric that he was, he had his own tombstone made while still alive: on this stone he built his spiritual legacy: the formula that he had devised for a new form of the catholic church.