Bangladesh - Workers

Does anybody on this forum have personal contacts with people who are active in organizing foreign workers from Bangladesh? Or know people from Bangladesh? I made contact with construction workers from Bangladesh here in Warsaw. These guys were from the elite of construction workers since they studied engineering in the former Soviet Union and are not doing the shittiest work but they said that a huge wave of manual workers from Bangladesh are coming to town. Need some consultation. Please PM me if you know anybody (hopefully good person. not bureaucrat).