Guilds and trade chambers are the socio-professional organizations, bringing together artisans working in the industry or several related occupations. They organize courses to raise the level of professional skills, they teach professional ethics, and they represent interests of members of the guild or the chamber.
Those are the regional organizations; each voivodship and/or district has its own one. You may wish to contact one of those regional organizations. [Guild=Cech, Chamber of Crafts = Izba Rzemieślnicza.]
The Polish keywords, corresponding to "carpentry" are: ciesielstwo or ciesiołka, and related one is stolarstwo - furniture making. These two professions often overlap in Poland. Cieśla is a worker who does carpentry and stolarz makes "stoły and stołki, etc" - tables and stools, etc.
Referring to LwowskaKrakow: Here is one add from Zakopane:
(name and address elided)
Domy z bali.Technologia spod Giewontu. Nowoczesne wykonanie. Więźby i pokrycia dachowe. Drewniane wykończenia wnętrz. Budujemy już 20 lat w całym kraju.
Log houses. Technology from foothills of Tatra [Giewont is a mountain in Zakopane - boletus]. Modern implementation. Rafters and roofing. Wooden interior finishing. We are in business for 20 years and we work all over the country.
LwowskaKrakow post may have exaggerated a little bit, but Polish Górals (Highlanders) - being born carpenters - have no problems of finding jobs as carpenters in Canada. I happen to know two brothers that run a very successful carpentry business in Toronto. At one point they were employed by ROM museum in Toronto to prepare an exhibition of various kinds of wooden houses - ranging from native habitations to ecologically efficient modern houses.