Hello, my name is Diego. I'm Argentine, so I'm a native Spanish speaker. I'm living in Brazil (here the whole people speak Portuguese) and I'm working as a Spanish teacher for some language schools (one is worldly known, it's Berlitz).
Also, I'm a particular teacher. With my wife (she's a teacher too) make customized material for the classes or we can use some commercial book. We can customize the classes that you need (making the most intensive in speaking, writing, grammar, etc.).
If you are interesting, we can talk about the details, the methodology that we use, the material and any doubt that you can have.
Regards, Diego.