[citation needed] In 1865 he became a partner in a mineral water factory (Sommer & Comp) in Bern, which he took over in 1867 and expanded into a chemical-technical and analytical laboratory.
He mainly took part in producing tinctures, ointments, pastilles, oils, and refreshing beverages.
From this laboratory emerged the later Wander AG, which is known worldwide in particular due to the malt beverage Ovomaltine.
[1] His successor as company leader was his son Albert Wander who was already helping in the work at this time.
"It must, of course, have seemed a wonderful innovation to the practising physicians when presently a thick, honey-like preparation was produced from the malt which was free of alcohol and carbonic acid, and contained only the excellent and long-appreciated nutrients of the malt in a highly concentrated form"Georg Wander's scientific and technical achievements included the gentle extraction of barley malt and its enrichment, for which he used quinine, iron and lime in addition to other substances.