Does not need theoretical background. Rarely supervises others. Technician Work requires both practical and theoretical skills. May interface between engineer and craftsman. Sometimes supervises craftsmen and other technicians.
Technologist Becomes more involved in design requiring more theoretical background.
Should also have practical skills. Frequently supervises others. Engineer Mainly concerned with the design and development of new products. Requires a solid theoretical background. Utilizes technicians and technologists for the gathering of experimental data.