Increasingly non-academic functions are being outsourced or shared between universities, so it will probably be more corporate than you think. You might not even work on a campus - most of the procurement for my employer is done in a business park about 100 miles away for example. Unfortunately universities tend to adopt all of the worst and none of the best practice from the corporate world....
I'm not sure how transferable such a job would be to Germany or to other sectors either if I'm honest - I have been told by administrator colleagues that they are not taken seriously by non-university potential employers, as it's assumed (incorrectly) that working for a university is stress-free. Have you been to have a chat with your university career service yet? I think they'd be able to give you a better idea about the different possibilities.