I have a friend who meets your criteria. He is native Polish and he lives in Poland. He speaks a very good Russian and he's lived for many years in USA, so he speaks excellent English, too. He's an engineer with a lot of experience. He might be interested in your offer but he doesn't have a freelancer account, so I'm trying to contact you on his behalf. If you are interested to get in touch with him, please contact me. I'm not his agent and I won't have any personal financial interest in this business. I'm just helping my good friend.