STS Technical Services is hiring Welders in Greencastle, Pennsylvania. Available Shifts. 1st Shift: Mon-Thur | 5am to 3pm (Potential weekend OT). 2nd Shift: Mon-Thur |4pm to 2am (Potential weekend OT). Weekend: Fri, Sat & Sun | 5am to 5pm (40 hours paid potential weekday OT). Position Summary. This position is responsible for operating welding equipment to build high quality parts, subassemblies, and finished product. Weldments vary in type, size...