Foundry workers assist craftspeople working in the foundry and have a wide variety of tasks, such as: machine moulding operators, who control the moulding machine; furnace operators, who load the furnaces and remove the castings and also look after the maintenance of the furnaces; casters, who fill the casts with molten metal; knock out operators, who remove the castings and; fettlers and grinders, who carry out the finishing process on the castings.