The UNCCD Science-Policy Interface (SPI) consists of globally selected independent scientists, regionally nominated independent scientists, policy makers (CST bureau members) and observers. For every term of the SPI the members are selected by the CST Bureau, following an open application process.

Former SPI observers
FAO Representative
Representing IUCN as observer
WMO Representative
Adam Fysh
UNDRR Alternate
UN-Habitat Representative
Representing UN Environment as observer
CSO Representative
Representing FAO as observer
UN-Habitat Alternate
Observer from 2014-2017