| 1 | | Jefe De Planta | N/A |  ES | | | N/A | Cadagua S.A. | N/A | N/A | Environmental Services | N/A | N/A |
| 2 | | Jefe De Planta | jaen | ES | | | N/A | Sacyr | N/A | Comunidad De Madrid, Madrid, Spain | Renewables & Environment | N/A | +34 945430805 |
| 3 | | Jefe De Planta | madrid | ES | | | N/A | Airgas | N/A | Radnor, Pennsylvania, United States | Think Tanks | Radnor, Pennsylvania, United States | +1 5595845581 |
| 4 | | Jefe De Planta Edari Sarriã Hinojosa Paper | barcelona | ES | | | N/A | Veolia | N/A | France | Environmental Services | N/A | +33 248752569 |
| 5 | | Jefe De Planta | madrid | ES | N/A | | N/A | Acciona | N/A | Comunidad De Madrid, Madrid, Spain | Mechanical or Industrial Engineering | N/A | +34 900866002 |
| 6 | | Jefe De Planta | vigo | ES | N/A | | N/A | Promens | N/A | Kopavogur, Gullbringusysla, Iceland | Plastics | N/A | N/A |
| 7 | | Jefe De Planta | valencia | ES | N/A | | N/A | Cemex | N/A | Monterrey, Nuevo Leon, Mexico | Building Materials | N/A | +52 8183001000 |
| 8 | | Jefe De Planta | madrid | ES | N/A | | N/A | Grupo Norte | N/A | Spain | Facilities Services | N/A | +34 944483334 |
| 9 | | Jefe De Planta | vigo | ES | N/A | | N/A | Levantina Group | N/A | Novelda, Valencia, Spain | Building Materials | N/A | N/A |
| 10 | | Jefe De Planta | marbella | ES | N/A | | N/A | Cepsa | N/A | Madrid, Madrid, Spain | Oil & Energy | N/A | +34 977175918 |
| 11 | | Jefe De Planta | gijon | ES | N/A | | N/A | Praxair | N/A | Danbury, Connecticut, United States | Chemicals | Danbury, Connecticut, United States | +1 8432078885 |
| 12 | | Jefe De Planta | sevilla | ES | N/A | N/A | N/A | Cepsa | N/A | Madrid, Madrid, Spain | Oil & Energy | N/A | +34 977175918 |
| 13 | | Jefe De Planta | huelva | ES | N/A | N/A | N/A | Cepsa | N/A | Madrid, Madrid, Spain | Oil & Energy | N/A | +34 977175918 |
| 14 | | Jefe De Planta | barcelona | ES | N/A | | N/A | Klüber Lubrication | N/A | Germany | Chemicals | N/A | N/A |
| 15 | | Jefe De Planta | sevilla | ES | N/A | | N/A | Recilec | N/A | Andalucía, Andalusia, Spain | Environmental Services | N/A | N/A |
| 16 | | Jefe De Planta | bilbao | ES | N/A | | N/A | Fagor Industrial | N/A | Spain | Hospitality | N/A | N/A |
| 17 | | Jefe De Planta | valladolid | ES | N/A | | N/A | Fcc Servicios Ciudadanos | N/A | Madrid, Madrid, Spain | Environmental Services | N/A | N/A |
| 18 | | Jefe De Planta | madrid | ES | N/A | N/A | N/A | Derovo S.A. | N/A | Portugal | Food Production | N/A | N/A |
| 19 | | Jefe De Planta | N/A | ES | N/A | | N/A | Global Omnium | N/A | Spain | Utilities | N/A | +34 963860600 |
| 20 | | Jefe De Planta De Compound | murcia | ES | N/A | | N/A | Sabic | N/A | Riyadh, Ar Riyāḑ, Saudi Arabia | Plastics | Riyadh, Ar Riyāḑ, Saudi Arabia | +52 551722047 |