Under close supervision at an apprentice level, assists in performing basic service or repairs in a specialized skill area such as mechanical, electrical / electronic, hydraulics / pneumatics, millwright, welding, plumbing, carpentry, painting, locksmith or machine servicing, etc. Assist in performing basic O&M service or repair work in a specialized skill area such as mechanical, electrical / electronic, hydraulics / pneumatics, millwright, welding, plumbing, carpentry, painting, locksmith or machine servicing, etc.