When Make-Up Artists Work For Brands (Such as rimmel london,max factor Etc.) What do they Do ...?

Hii i was wondering i no make-up artists can work for company's etc. but i was wondering when they work for make-up brands what do they do theydo . Eg. Do they go to there own catwalks . i don't know lol.


Please use detailed .When Make-Up Artists Work For Brands (Such as rimmel london,max factor Etc.) What do they Do ...?
They do promotions at runways or movie sets, and come up with new colors and products.