If so, what type of lawyers should be consulted
There are people esp in restaurant industry like indian,japenes,vietnamese etc who bring chefs from there respective countries...since you also plan to be in that kind of industry I am sure you can,as far as I know the person should have required qualifications for the job and you cannot find anyone in Poland for that job like ethnic food chefs or massuers etc.About taxes you have to legally pay there wages and taxes it is better to consult some agents( plenty there) as the attorneys charge a lot basically to fill forms when you probably can get away with cpl grand zlotays.
For real help I would as the Indian restaurant owners,how and about they do as vietnamese owners usually do not open and tell much and so does the japs..Good Luck!