Yes, it is possible to change employers while holding a Malta work visa, but approval from the Maltese authorities is required. The new employer must apply for a fresh work permit or Single Permit on your behalf through the Identità portal. You cannot start working for the new employer until the updated permit is approved. Changing jobs without authorization may result in permit cancellation or legal issues. The process involves submitting a new employment contract and supporting documents, and processing times may vary depending on the application.