Hi. I´m responding here in case you need this kind of help in the future, because I already have a commitment for the dates you mention. I´m an American translator and interpreter, a native English speaker, but I´ve lived in Brazil for 30 years, so my Portuguese is also excellent. I worked in the offshore industries for about 15 years (seismic exploration, oil production on platforms, ROV/diving ops, oceanography, etc.) along the Brazilian coast from Fortaleza to Florianópolis, but mostly in the Campos Basin. I live an hours drive north of Rio, so getting there is no problem. I do translation of written texts, transcription/translation of videos, and interpretation of conversation (not simultaneous - only 1person speaking, pause for me to translate, next person speaking, pause for me to translate, etc.). Please contact me if you need this type of service in the future, but with a little more advance notice. Thanks, David