An aviation welder is a highly skilled welder, specifically trained to work with aircraft structures and special materials using tungsten inert gas (TIG) and metal inert gas (MIG) techniques, as well as laser and plasma welding, among others. Aviation Welding Technicians also work with alloys of nickel, aluminum, titanium, cobalt, stainless steel and carbon steel. They perform electric arc processes, resistance welding, and Oxy-Fuel/Oxyacetylene set-up, cutting, welding and brazing procedures.

Theoretical knowledge of metallurgy and aircraft structures is a necessity, as is an ability to read and interpret complex blueprints and technical drawings.

New technologies involving laser equipment and new materials are increasingly being used in aircraft repair. Therefore, future welding technicians will also be required to have skills in joining exotic materials, and knowledge of new welding techniques, such as friction stir welding and laser welding. New technologies such as pulse TIG/MIG machines require very specific skills.