Yes, NASA employs welders as part of their team of skilled craftsmen and technicians who work on building and maintaining various structures, vehicles, and equipment. Welding is an important skill in many areas of engineering and manufacturing, and is used extensively in the construction and repair of spacecraft, satellites, and other aerospace hardware. NASA welders work with a variety of materials, including metals such as aluminum, steel, and titanium, and use various welding techniques to join these materials together in a strong and reliable manner.