I am a native Russian speaker, born, raised, and educated in Russia, and a fluent English speaker (I've lived in USA for many years already, and I was a professional translator from/into English long before I moved to the States). I used to work as a translator for the Russian publishing house Nauka ("Science") in Moscow. I only do human translation (no google translate!). I can guarantee impeccable terminology, style, and grammar of Russian translation. Please check reviews on my profile. It would be my pleasure to translate your document. Please contact me to discuss the details.
P.S. I am the actual translator who would do the work, not an agency. Don't pay a middleman; they will outsource the job to the cheapest guy they can find to make a profit out of it, guess what kind of quality this would mean. Feel free to call me on skype or phone and verify for yourself that I am actually a native Russian speaker.
Just FYI, I own a small consulting business registered in the state of Illinois. You could pay me as an individual freelancer or as a business, whichever suits you better.
Here are some of my translations from English to Russian, out of many:
https://www.freelancer.com/jobs/Website-Design/Website-brief-translation-from-English/
https://www.freelancer.com/projects/Translation/Math-article-translation-from-English/
https://www.freelancer.com/jobs/Translation/Translation-game-from-English-into/