* Automotive engineers: Design and develop car components and systems.
* Manufacturing workers: Assemble the cars on the assembly line. This could include welders, painters, technicians, etc.
* Designers: Create the aesthetic look of the car (interior and exterior).
* Mechanics/Technicians: Repair and maintain cars. (While they don't *make* new cars, they are essential to the automotive industry)
So, the answer is more nuanced than a single word.