An MC Observer can be a researcher, engineer or scholar observing a COST Action's coordination and decision-making process and activities on behalf of his/her institution of affiliation (approved NNC institutions, approved EU agencies, approved European RTD, approved International Organisation or approved IPC institutions).
Near Neighbour Countries (NNC)
NNC are the countries approved by the Committee of Senior Officials (CSO) to benefit from dedicated support for the integration of their researchers in COST activities.

Jordan - Jordan University of Science and Technology
Tunisia - Institute for Rural Engineering, Water and Forestry
Ukraine - Kiev National University of Construction and Architecture
Georgia - G. Eliava Institute of Bacteriophage, Microbiology & Virology (IBMV)
International Partner Countries (IPC)
All those countries that are neither COST Member Countries / Cooperating State nor are they COST NNC.

South Korea - GIST-Gwangju Institute of Science & Technology
Singapore - Nanyang Technological University
United States of America - United States Environmental Protection Agency
United States of America - University of Arizona
United States of America - University of Cincinnati
Australia - University of South Australia
Australia - University of South Australia
Mexico-Autonomous University of Yucatan, MÉXICO
Australia - University of South Australia
Pakistan - Government College University Faisalabad
Australia- University of South Australia
Australia - The University of Queensland
Australia - University of South Australia