Education: Secondary (high) school graduation certificate. Work setting: Various locations. Tasks: Apply successive coats of compound and sand seams and joints. Fill joints, nail indentations, holes and cracks with joint compound using trowel and broad knife. Measure, cut, fit and install drywall sheets. Position and secure sheets to metal or wooden studs or joists. Smooth out excess compound and allow coat to dry. Experience: 1 year to less than 2 years.