He didn't lay out how his government would save jobs, but called for investment in training and new production tools. Castex and President Emmanuel Macron are expected to announce the makeup of the new Cabinet in the coming days.
Its goal will be to work out how "to ensure the return of jobs and the sustainable maintenance of industrial jobs exposed to global competition," Castex told reporters at the X-FAB factory in Le Coudray-Montceaux south of Paris.
The government sees the factory, which makes semiconductors used in cars, phones and other equipment, as an example of European cooperation and innovation.
Before being named prime minister Friday, Castex coordinated France’s strategy for gradually easing lockdown measures and reviving economic activity.