Several Jewishgenners have contacted me to say that the first line of my message was missing. I must have been distracted by circumstances here. Anyway, here it is, in it's entirety, again.:
You may wish to contact Jewish Tour (jewish-tour.com) a reliable, established firm based in Minsk which offers an economical in-depth genealogical service as well as heritage tours. They have a genealogy staff fluent in many languages including, English, French, Yiddish and Hebrew. They are also well connected with most of the current Jewish communities across Belarus. They also work closely with the Jewish Agency Limud. Another avenue to pursue is to deal directly with the Belarus National Historical Archive (http://niab.by/newsite/en/our-services) which also offers research services.
When dealing with a private researcher (whether a firm, organisation or individual ) for a genealogical search in the Belarus archives you should bear in mind that you must authorise the researcher with an Apostille issued by the appropriate authority in your country. Without the Apostille the researcher cannot legally conduct your research. If you deal directly with the Archive an Apostille is not necessary.
For the sake of clarity I have no association with either Jewish Tour or, obviously, the National Historical Archive of Belarus although I do know individuals who have availed themselves of services offered by both. I do not do genealogical research.
Please feel free to contact me if you have any questions which you feel I might be able to help with.
Gemar chatimah tovah!