The rules for recognition of professional qualifications acquired in the Member States of the European Union (applies also to EEA and Switzerland) in order to work in one of the Member States are governed by Directive 2005/36/EC of the European Parliament and of the Council of 7 September 2005 on the recognition of professional qualifications (Official Journal EU L 255 of 30 September 2005, p. 22, as amended ), implemented into the Polish legal system by the Act of 22 December 2015 on the rules governing recognition of professional qualifications acquired in the Member States of the European Union (Journal of Laws of 2016, item 65) and by amending some acts governing issues related to professions.
If the given profession is regulated, the person who acquired qualifications in another Member State needs their official recognition. In this case, the competent authorities of the accepting Member State grant their recognition. To recognise the professional qualifications it is necessary to have the full right to practice the profession in the country where they were obtained.
In the case of professions not regulated, the employment of worker with qualifications acquired in another Member State of the EU depends on the employer.
Detailed information regarding recognition of professional qualifications can be found on the website of the support centre for Directive 2005/36/EC under the following link: https://www.gov.pl/web/nauka/uznawanie-kwalifikacji-zawodowych-1
English version: http://www.nauka.gov.pl/en/recognition-of-professional-qualifications-directive-2005-36-ec/
Database concerning regulated professions
European regulated professions database of the European Commission provides information on regulated professions in different Member States. Link to the Database: http://ec.europa.eu/growth/tools-databases/regprof/
Regulated professions in Poland: