| 2111 | Physicists and Astronomers |
| 2112 | Chemists |
| 2113 | Geologists, Geochemists and Geophysicists |
| 2121 | Biologists |
| 2131 | Civil Engineers |
| 2132 | Mechanical Engineers |
| 2133 | Electrical and Electronics Engineers |
| 2134 | Chemical Engineers |
| 2141 | Industrial and Manufacturing Engineers |
| 2142 | Metallurgical and Materials Engineers |
| 2143 | Mining Engineers |
| 2145 | Petroleum Engineers |
| 2147 | Computer Engineers (Except Software Engineers) |
| 2151 | Architects |
| 2153 | Urban and Land Use Planners |
| 2154 | Land Surveyors |
| 2171 | Information Systems Analysts and Consultants |
| 2212 | Geological and Mineral Technologists and Technicians |
| 2225 | Landscape and Horticultural Technicians |
| 2231 | Civil Engineering Technologists and Technicians |
| 2232 | Mechanical Engineering Technologists and Technicians |
| 2234 | Construction Estimators |
| 2241 | Electrical and Electronics Engineering Technologists and Technicians |
| 2242 | Electronic Service Technicians (Household and Business Equipment) |
| 2243 | Industrial Instrument Technicians and Mechanics |
| 2251 | Architectural Technologists and Technicians |
| 2253 | Drafting Technologists & Technicians |
| 2261 | Nondestructive Testers and Inspectors |
| 2271 | Air pilots, flight engineers, flying instructors |
| 2281 | Computer and Network Operators |
| 2283 | Systems Testing Technicians |