In 1907 he left the Landestopographie and moved to Jena, Germany, where he joined the company Carl Zeiss to build up a new department for producing geodetic instruments. He began with the development of levelling instruments and designed later also a new theodolite, the Th I.
It may be perhaps typical for the inventors like Wild that he worried little about the financial condition of his company, and this ended finally with the consequence that Wild separated in 1932 from the company he founded, in order to be able to work as a freelance technical designer and inventor. He continued designing up until his death in 1951. Among his designs were the legendary DK1, DKM1, DM2, DKM2, and DKM3, for Kern & Co, Aarau, besides other things.