No such thing as an "immigration center" in moscow or anywhere else in Russia. OVIR handles all immigration and visa. The only way to live and work in Russia legally is work for a company in Russia that provides visa support and work permit or marry a Russian citizen and go through the 5 year nightmare of immigration. Working in Russia can be done illegally but you must buy an invitation, get the visa from your local Russian consulate then do a legal registration when you get here and work "under the table". Language Link is a good company for doing it all legally. Not cheaply though. Check out their web site for info about jobs and internships.