A Psychometrician does the selection and evaluation of people who apply for jobs. This is done according to the candidate's personality, aptitude, interests and abilities. He/She uses psychological measuring techniques, such as tests and questionnaires. The purpose of this is to be able to select the best candidate for a specific job. At some companies the Psychometrist is allowed to write psychological reports under the supervision of a registered psychologist. 

A special education teacher is someone who works with children and youths who have a variety of disabilities. Children with special needs require unique instruction by specially trained professionals to help them achieve their highest potential and strive to progress beyond their limitations. Special education teachers are patient, understanding educators dedicated to giving each individual student the tools and guidance needed to help them maximize success. 

An audio engineer (or a sound engineer) is a trained professional who works with the mechanics of recording, mixing, and reproducing sound. Audio engineers are not the same as sound producers, writers, or performers, as they deal specifically with the technical and the mechanical aspects of music and sound; nothing else.