Board Thread:Questions and Answers/@comment-25372111-20150110222840/@comment-32500188-20150110234421

You have... extremely big ambitions there. (´･o･`) Simply put, it starts with money. A LOT of it. Because not only are you going to have to pay licensure fees required by YAMAHA to use their development kit (as well as gain approval of whatever project you'll have to propose to them), you're going to have to hire the staff, voice provider, and purchase/rent the necessary facilities and equipment... and then some.)

As for joining an already existing company, I'm pretty sure you'd have to put in a resume of some sorts with the company themselves (...and of course have whatever necessary experience or credentials in recording engineering/music/programming/etc. to back you up).

In short, it's not something that's an easy thing to do, so if you're considering creating some sort of virtual vocalist of your own, you're probably going to be way better off in making an UTAU. It's not VOCALOID, but at the very least it's the most cost-effective route in doing that. (as the software itself is free...)