Change of Employer
As mentioned above, the requirements differ whether the holder is seeking to change his position within the first two years of his Blue Card Residence Permit or after two years of continuous employment and whether the old position was in Germany or a different EU member state.
A new position in Germany within the first two years:
According to § 18 b Section 2 AufenthG authorization of the German immigration services is required when changing a job within the first two years. The new employment contract likewise has to comply with the EU Blue Card application requirements.
A new position in Germany after two years:
The new work contract also has to meet the required threshold but other than that, there is no need for an authorization.
EU Blue Card holders with a new position in Germany:
After 18 months of continuous employment in a member state EU Blue Card holders can enter Germany without a visa and apply for an EU Blue Card at the local immigration authority within one month of entering the country.