Clearprop,
Whatever nationality you are (and it's not so important as you might think as long as you can meet the basic higher ed requirements for immigration), you will not get into any Flight Test department as a pilot unless you have already completed a FTP course at a recognised National (read military) school. Even then it probably helps if you've been on squadron with pilots already flying with the company you're joining - it's that small a world.
From your history, I would have to second the method of joining the Design or Flight Test department of a company that has an active certification program. Such is the demand for piloting expertise on test rigs that whatever Engineering degree you have, you'll probably get "flight" time but not in an aircraft. FYI your resume is very similar to that of the majority of Flight Test Engineers (FTEs) I've known but even then the majority of those gentlemen did not get onboard a test aircraft as soon as they joined.