Twenty-five environmental experts are now trained to deploy as Environmental Field Advisors (EFA) to sudden-onset disasters and conflicts around the world. Experts from MSB Sweden, Swiss Agency for Development and Cooperation (SDC), World Wildlife Foundation (WWF), Centre for International Peace Operations (ZIF) and the UN Environment Programme (UNEP) are ready to support Humanitarian Country Teams in mainstreaming Environment across all areas of humanitarian response. Specialised expertise is often required to support humanitarian actors identify pragmatic ways to integrate environment and natural resource issues into all elements of the Humanitarian Programme Cycle and agency-specific activities. The five-day training was generously hosted by MSB in Revinge, Sweden, from 31 November to 4 December 2015, in cooperation with SDC, WWF, and the UNEP/OCHA Joint Environment Unit (JEU). The 25 EFA roster members are now available to deploy through the OCHA-managed Stand-By Partnership Programme. EFAs have already deployed to Sudan and the Philippines and with the additional expertise now available within MSB, SDC and ZIF emergency rosters, EFAs are expected to increasingly deploy in 2016.