This sub-major group comprises technical occupations related to natural sciences, including technical occupations in physical sciences and technical occupations in life sciences.

This sub-major group comprises technical occupations related to applied sciences other than engineering, including technical occupations in architecture, drafting, surveying, geomatics and meteorology; technical occupations in computer and information systems; and technical inspectors and regulatory officers.

This sub-major group comprises technical occupations related to engineering, including technical occupations in civil, mechanical and industrial engineering, as well as technical occupations in electronics and electrical engineering.