LAN does hire expats from time to time, at least in Chile they do. You will need to be fluent in Spanish, which I assume you are, being in Bolivia. All the other, requirements, are subject to confirmation according to the need of the moment. You should hold a Chilean CPL and lot of flying time, ideally multi-crew jet time, is obviously a +.
You should send your resume, in Spanish, with an attached picture, ideally of yourself, to:
Sandra Carrasco
Base Mantenimiento LAN Chile, piso 4
Aeropuerto Arturo Merino Benítez
Santiago
Chile
I guess if handed personally, it could be a plus and thus you make sure it gets where it should.
Regards,