Switching visa to Blue Card

Hi there,

I am currently pursuing an M.Sc. in Economics at the University of Bonn. I have completed all my courses, and I only need to finish my thesis. I hold a bachelor's degree in economics from a university recognized in Germany (Anabin H+).

I have received a permanent employment offer from the company where I am currently interning as a Financial Data Analyst, with a salary exceeding the threshold for the EU Blue Card (over €48,000). However, the HR department is withholding my contract, stating that my current visa status is that of a student. They believe that if I sign the contract, I would be required to drop out of my studies, which is not an option for me.

I would like to know if this reasoning is logical. Is there a legal requirement preventing me from switching my visa status from student to EU Blue Card from the HR perspective? Are there any laws that allow me to make this transition in Germany?

Thank you for your assistance.

Best regards,  
Hossein