I'm working in IT. Here it is very natural
sich die benötigten Kenntnisse im Selbststudium anzueignen.
That is because many trainings have the focus to lead to some kind of certification.
Those trainings are cheap for the employers, because subsidized by the
The pain to go through such
certification is doubtful. If you are already in employment you gain little and risk to have to repeat the examination. (No fun at all)
The things you learn are of moderate value for your practical work. On the other side these certifications might help to get a first employment or after inoccupation.
The other way to contract some external professional is usually very expensive.
Mittelständische Betriebe will try to go with the cheap solution.
BTW in 1995 I was certified MCSE (which means Microsoft Certified System Engineer and not Minesweeper Consultant and Solitaire Expert). I renewed the status for some years.
IT certifications are always limited for some years because software changes often. I hope the examinations some you have to pass in linguistic context are of more durable value.
I started to learn some foreign languages e.g. Italian in advanced age, because I got a bit tired of repeatedly learning for IT certifications of this kind.
And I did it
obwohl ich in der Schule im naturwissenschaftlichen Zweig einen denkbar schlechten Fremdsprachenunterricht hatte