Welder Level A means a person who has advanced training, skills and abilities to weld all materials, including specialized alloys, by any manual welding process, in any position, and such other work as is usually done by a Level A Welder.

In general, Welders use manual or semi-automatic welding equipment to fuse metal pieces together. They use flame-cutting, brazing and soldering equipment. Heat is applied to the pieces to be joined, melting and fusing them to form a permanent bond. They use metal shaping machines such as brakes, shears and other metal straightening and bending machines. They generally plan work from drawings or by analyzing damaged metal, using their knowledge of welding and metals. Welders may specialize in certain types of welding such as custom fabrication, ship building and repair, pressure vessel welding, pipeline construction welding, structural construction welding or machinery and equipment repair welding.