The "DGB" ("Deutscher Gewerkschaftsbund") is the umbrella association for trade unions in Germany. There are offices in all German cities and regions.
The “Bundesvereinigung der Deutschen Arbeitgeberverbände” is the umbrella association for employers. It has offices in most large German urban areas.
Haus der Deutschen Wirtschaft
Breite Straße 29
Chambers of Industry and Commerce
The "DIHK" is the umbrella association for the German Chambers of Industry and Commerce. It has offices in most large German urban areas.
Breite Strasse 29
Agentur für Arbeit (Job Centre)
The "Agentur für Arbeit" has a great deal of helpful advice for job-seekers, on qualifications and further training, and information on job offers. Offices can be found in every large German town and city and in every region.