There is an interesting DevLog regarding employees over at Gas Station Simulator that you might find very interesting as it will directly influence Road Diner Simulator:

https://store.steampowered.com/news/app/1149620/view/3317486166919844947

You will also find some details about new things added to employees for Road Diner Simulator compared to the ones we now have in Gas Station Simulator. Have a read!

https://store.steampowered.com/app/1149620/Gas_Station_Simulator/