Know, qualify and perform the following: MIG: carbon steels, stainless steel, and aluminum and combination; TIG: carbon steels, stainless steel, aluminum, and combination; Submerge ARC: carbon steels, stainless steel, and combination; Flux Core: carbon steels, stainless steel, and combination. Several factors can influence the pay scale, including but not limited to: Federal contract labor categories and contract wage rates, collective bargaining agreements, geographic location, business considerations, scope, and responsibilities of the position, local or other applicable market conditions, and internal equity.