Hi Lamar --

You might also want to check out Médicos Sin Fronteras which is a non-profit which helps provide medical assistance around the world. I don´t know about paid employment, but there may be an opportunity for you there.

How is your Spanish? That is something else that you want to consider before making the leap. If you aren´t too confident in your language skills, you might want to concentrate your efforts in the costal areas...particularly along the southern Valencian coast as there are many communities of English-speaking-only expats (Brits, Americans, etc.).

Good luck!