When you come to Germany as a skilled worker, you have to prove first in which job you have finished vocational training. You submit the respective application to the competent office and enclose school and training reports and certificates, documents for further qualifications or any other certificates related to your profession. The recognition of your professional qualification offers you many advantages, so you would find a job more quickly and also earn more money. Here you find contacts that will support you in the recognition procedure for your professional qualification. (Links to paragraph Contact Partners). Contact your potential employer for information! Often they provide financial as well as organisational support to their staff in the procedure for the recognition of professional qualifications, but also in the search for an accommodation or compulsory registrations at authorities. As EU citizen you are principally free to work in Germany. However, basic knowledge of German language is important, and in larger enterprises also English may be very useful, in particular in companies acting on the global market.
You get more information on the recognition of your professional qualification here