I always wanted to fly Corporate, but knew that my chances were really low. Where i fly there's like 3 Large Bizjets, a handful of midsizes and light jets and 20 or so King Airs, so i guess i got really lucky this time.
But anyway...I did this... exactly this... can't find a better description.
First, you get flying experience in any planes--instructing, pipeline patrol, bush.
Second, get some experience in King Airs.
Last, they hire you and send you to the type rating course, after which you get time in type.
Started doing pipeline and aerial survey, got rated in Kingairs C90, 200 and 350.
Then got this call that offered me the same rate the local airline F/O's get plus belts and whistles, and of course a seat in class for a C680+ rating, stamped the license and drove to the factory to pick it up.
That was with almost 1200TT, 10 hrs Jet time and a MCC cert. (That is not required in this part of the world, but helps).
I would have thought that this chance would have come much more later if ever.