This refers to those skilled workers who, by a combination of training and experience (usually through an apprenticeship), are well qualified to perform specific types of tasks, operate specific classes of equipment or perform specific operations.

Craftsmen are mainly required for plant construction and for the manu­facture of equipment and components. It should be noted that qualified pipe fitters and welders each represent approximately 15-20% of the total craftsmen workforce during the construction stages.

Examples of this type of worker would include boilermakers, carpenters, concrete workers, electricians, insulators, iron workers, millwrights, opera­tors of heavy equipment, painters, pipe fitters, sheet-metal workers and welders.