Who are they and what do they do? The dish washer or washer up deals with cleaning up in restaurant or hotel kitchens or any other eating place. S/he can also work on board ships.
What are the activities of the job? Cleaning scraps from dishes; washing dishes, cutlery, glasses and cookware; replacing them with clean items; cleaning the tables and the kitchen.
Where is it done and under what conditions? In restaurant and hotel kitchens.
What tools/equipment do they use? Dishwashers, detergents, buckets, and other sorts of cleaning equipment and materials.
What do you need to succeed? You do not need any particular level of education to become a dishwasher. But you do need to be methodical and consistent.