Let's say you went to an English-speaking country, such as in the U.S.A. for work. You are born and raised in a non-English speaking nation for example in an asian country. And then, after several years, you've decided to visit your home country, and your friend just gave a comment on your native-sounding English speaking skills, where in fact you already had that BEFORE going to the U.S.A. So, making your reaction into a sentence, it goes like:
This is already the level of my speaking skills before I got there in the U.S.A. for work.
The bold letters are(above), I think, a bit off. Because I'm not sure what verb tenses should I use here in this particular situation. Another alternative is:
I've already had this level of speaking skills before I got there in the U.K. for work. (I'm more confident on this to be correct.)