The GCOS Secretariat, located at the WMO headquarters in Geneva, Switzerland, supports the activities of the Steering Committee, the GCOS panels and the GCOS programme as a whole.
Secretariat members
| Nir Stav | Director |
| Magaly Robbez | Programme Assistant |
| Antonio Bombelli | Scientific Officer TOPC |
| Caterina Tassone | Scientific Officer AOPC, Head of GCOS |
| Belén Martín Míguez | Scientific Officer OOPC |
| Tim Oakley | Network Manager |
