All non-European Union (EU) citizens wishing to work in Germany must hold work permits. A residence visa is required for all stays of more than 90 days. It is highly recommended that the appropriate forms for these permits or visas be obtained and submitted before arrival in Germany. Permit and visa forms can be obtained from the German Embassy or Consulate in your country, or by download from the websites maintained by those diplomatic missions. The German authorities may take up to three months to process these forms. The following documents are required as part of the application: a valid passport; two passport photographs; an employment contract or, if a student, an admissions certificate from a German university; and proof that the individual will be able support himself or herself financially while staying in Germany.

This is just a sample of what you'll find in the complete Germany guide.