I'd already been diving deep into foreign languages and accents for over 15 years, before I ever helped others with it. I am a practitioner first, teacher second. It's not just theory for me. I live and breathe this stuff, because I love it. So much, in fact, that I quit my engineering career in order to do this full time.
My first and deepest language/accent adventure was when I went very deep into both Puerto Rican Spanish and Malagueño Spanish. (I got a near-native accent in both.) I became friends with many native speakers from both places and have lots of crazy stories.
Now, I'm on a journey to speak 100% like a Brazilian native speaker (or as close as I can get). And I can help you with the "opposite" journey (Brazilian to American) in a way that most other people can't. You can judge my results so far – it's a work in progress and I'm getting closer every day. I do this not because I have to, but because I personally love going deep. It's a fun journey for me. I'm already fluent in Portuguese despite never visiting Brazil yet (I plan to visit and maybe even live there someday… hopefully soon!)
I also speak Spanish fluently, and a bit of Dutch, Russian, and Italian. I frequently get compliments on my pronunciation even in languages that I don't speak – just because of this skill with sounds that I have developed. In recent years, I've also started studying the formal side of accent acquisition, including phonetics and how dialect coaches help actors learn accents for TV, movies, and more.
And I've done this as a native speaker of English from the US, without any family members who speak Spanish or Portuguese (or any of the languages I mentioned).
When I do something, I obsess over doing it well. When you hire me, we get to use my obsession to your advantage.
If you're Brazilian, already advanced in English, and want to speak with an American accent (or closer to it)…
I'm your guy. I live and breathe this stuff.
Bora?