A worker who works in direct support of engineers or scientists, utilizing theoretical knowledge of fundamental scientific, engineering, mathematical, or draft design principles. Solves practical problems encountered in fields of specialization, such as those concerned with development of electrical and electronic circuits, and establishment of testing methods for electrical, electronic, electromechanical, and hydromechanical devices and mechanisms, application of engineering principles in solving design, development, and modification problems of parts or assemblies for products or systems, and application of natural and physical science principles to basic or applied research problems in fields, such as metallurgy, chemistry, and physics.

Classifications are made according to specialization as electronics technician, mathematical technician.