Hayden Montgomery is the Special Representative of the global Alliance of research on greenhouse gas in agriculture (GRA). From 2013 to 2016, Hayden was the ambassador of New-Zealand in Argentina, Paraguay and Uruguay. Before, he was strongly involved in issues related to climate change, especially as the main negotiator for agriculture and forest for New-Zealand within the UN negotiations on climate change and special adviser of the global Alliance of research on greenhouse gas in agriculture, based in New-Zealand Embassy in Paris.