Edit:
Just wrote a comment to explain that I can't for the life of me recall his nick, when it suddenly came to me: it's translationsnmru.
I assumed he had lived in the UK had some kind of international connection. He never explained the reason why he's so good at English. Now that I named him, I hope I am not mixing up his comment about never having been abroad!!! Sounds a bit unlikely to me... or?
I can compare him with myself, and I'd say he's better at English: He's native tongue is further removed from English than mine. I had a lot of exposure to English, growing up, while it's unlikely that he did. Finally, I've lived in the UK for 15 years, whereas he never lived in an English speaking country. Yet, I have the feeling he's better than me. Plus, he can explain both English and Russian grammar, while I can't.
But remember: It's not necessary to be a wizard in order to successfully use English for work. As long as you don't make obvious grammatical mistakes on a regular basis, and you don't misuse expressions and confuse people, vrthere is no problem.
PS - iCake - you seem pretty good yourself! I have never paid too much attention to your English but "piqued my curiosity" is rather elegant English, and it's something only an educated person would say. Might well be British rather than American. I know the expression but I wouldn't have used it. I would probably just said "I got curious" or something like that.
Another Russian person who speaks really nice English, is Sergei Lavrov. Hardly no European continental politician speaks English as well as Lavrov does.
Of course, he has an accent, but his vocabulary is great and there is no issue with his grammar. He conveys every nuance of what he wants to get across. His accent is totally unobtrusive and sounds rather chic.
Don't know how he got as good as he is - maybe he worked abroad at some point in his career.
I've seen a few in-depth interviews with him, in English, on RT and he comes across really well. It really works to Russia's advantage to have somebody as eloquent as him to represent its foreign policy.