| Nace | Description | Number of Company |
|---|---|---|
| 71.12.03 | Engineering and consulting services for building projects | 3754 |
| 71.12.04 | Engineering activities towards geological, geophysical and related research and consulting services (services such as mineral deposits, underground soil formation, etc.) (except those for oil and gas) | 292 |
| 71.12.06 | Engineering and consulting activities for transportation projects (roads, bridges, tunnels, railways, airports, oil and gas transportation projects, ports, etc.) | 288 |
| 71.12.07 | Engineering and consulting activities for water, sewerage and drainage projects (projects for drinking water distribution systems, pumping stations, rain water management systems, waste water collection, etc.) | 177 |
| 71.12.08 | Engineering and consulting activities for industrial and manufacturing projects (steel mills, refineries, transportation vehicles, industrial machinery, etc.) | 765 |
| 71.12.09 | Engineering and consulting activities for energy projects (services for those using energy fuels such as coal, oil and gas as well as for plants and energy transmission and distribution lines for nuclear, water, solar, wind and other energi | 1666 |
| 71.12.10 | Engineering consultancy services (except those made in connection with a project) | 1745 |
| 71.12.14 | Building audit institutions | 1118 |
| 71.12.90 | Engineering and consulting activities for other projects (including management of telecommunication and broadcasting projects, natural gas and steam distribution projects and others) | 878 |
| 71.20.05 | Technical inspection activities of road transportation vehicles (periodical technical inspection services for cars, motorcycles, buses, pickups, trucks and other road vehicles) | 249 |
