Inspired by family tradition, from early childhood Ehrmann was prepared for the lead positions in the wood industry, so in the period from 1899 until 1908 he worked at a several prestigious wood processing companies.
Ehrmann, potaknut obiteljskom tradicijom, se pripremao za vodeće položaje u drvnoj industriji, pa je u razdoblju od 1899. do 1908. godine radio u nekoliko prestižnih srednjoeuropskih drvoprerađivačkih kuća.