Can I change employers while holding a Romanian EU Blue Card?

EU Blue Card holders are not permanently locked to one employer. In the first period of employment, changes are more tightly controlled, but after roughly twelve months the rules are relaxed.

After that initial period, the main obligation when changing employer or when there is a change affecting the admission criteria is generally to inform the competent authorities, rather than seeking a fresh authorisation in the same way. You should still verify the exact notification steps that apply to your situation before switching jobs.