Madrid
| Company | Registered Address | Agreement signature |
|---|---|---|
| Illustrious Official College of Doctors and Graduates in Philosophy and Letters and in Sciences of the Community of Madrid | C/ Fuencarral, 101, 3 – 28004 Madrid | 05/04/2006 |
| Official College of Agricultural Engineers of the Center and Canary Islands | C/ Bretón de los Herreros, 43 - 28003 Madrid | 29/09/2009 |