Welcome to the "normal" world of corporate aviation gentlemen. Since yoou guys seem to be talking about German companies, how do you say "This is only the tip of the iceberg" in German? I've been hired for jobs that "Start next week" and take three months (or never come to be), and jobs where I had a "three year contract" have ended abruptly when the aircraft was parked or went into extended maintenance. Add in the lack of a schedule, and you have a good idea what you're in for.
If this concerns you (It should), the airlines are hiring, they pay well, and Boeing and Airbus both are planning for long term increase in demand. Airlines do have a few downsides, so take your pick. Private aviation is growing these days, but it will never, ever, be stable!
FR