- International Solar Energy Society
 - Non-governmental global scientific organisation for the advancement of renewable energy technology and sustainable development. - DFN-Vereins
- German Research Network (DFN) links up scientists in a national communications infrastructure based on manufacturer-independent standards and with transitions into the public data network and into international science networks.
- Dechema e.V (1)
- Eurobats Secretariat
- United Nations group administering the 1991 Agreement on the Conservation of Bats in Europe, which aims to protect all 45 species of bats in Europe through legislation, education, and conservation.
- Geologische Vereinigung e.V.
- Nonprofit international earth science organization.
- Bayerischer Klimaforschungsverbund (BayFORKLIM )
- Interdisciplinary cooperation for research on climate changes in Bavaria/Germany and their effects on microorgamisms, plants, animals, and man.
- German Section of the Combustion Institute
- Organizes events for German-speaking members of The Combustion Institute.
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