This position must be able to perform the essential functions below. The differences between classifications are the level of mastery of the essential functions, the degree of supervision required when performing these functions, and the amount of lead direction provided to others. Technician I: Entry-level class. The Technician works under close supervision, performing the essential functions at an adequate level. Technician II: Journey-level class. The Technician works under general supervision, independently performing the essential functions at an advanced level. Technician III: Expert-level class. The Technician works with minimal supervision and has mastered the knowledge and skills needed to perform the essential functions.