As a night shift welder, your job is to assemble and weld components. In this role, you may also cut or fabricate metal parts, repair damage to existing systems, and perform any other associated tasks as necessary. Night shift welders usually work in areas that run 24/7 or may need emergency repairs, including some factories and plants. The definition of a night shift varies by employer, with some starting as early as 3 pm and others going until 7 am. Most night shift welders work regular hours, especially at companies that have staff for each shift, but employers may occasionally ask you to work longer if the workload demands it.