This sub-major group comprises professional occupations in natural sciences, including physical science professionals, life science professionals, and public and environmental health and safety professionals.

This sub-major group comprises professional occupations in applied sciences, other than engineering, including architects, urban planners and land surveyors; mathematicians, statisticians, actuaries and data scientists; computer and information systems professionals; and computer, software and Web designers and developers.

This sub-major group comprises professional occupations in engineering, including civil and mechanical engineers; electrical, electronics and computer engineers; manufacturing and processing engineers; natural resources engineers; and other engineers.