well, in university I specialized in "migration". At the moment I work with male prostitutes, but since most of them are from abroad I´d say yes.. working with migrants is my field.
hm..not really an expert here. Just found this: http://www.lastfm.de/forum/21717/_/397580 But it´s a rather old topic so maybe there is a way now.. can´t really help you ;-/