Q: Is it necessary for the employers to give a job offer each time when there is a vacancy of mid-level technical worker (recruitment for one worker whenever there is a vacancy)?

Answer:

Given that employers may need to appoint multiple intermediate skilled workers at one time, in order to simplify the process of recruiting domestic workers when employers have multiple foreign workers to be reclassified as intermediate skilled foreign workers at the same time, they can apply to a public employment services agency to simultaneously undertake domestic recruitment of workers. However, the public employment service agency will still issue just one approved recruitment certificate for the same application, with different numbers on the certificate indicating a labor shortage. This makes it easier for employers to apply to hire intermediate skilled foreign workers.