Lithuanian Energy Institute is a member of these associations and technology platforms:
| No. | Name | Website |
|---|---|---|
| National associations | ||
| 1 | Association “RTO Lithuania” | Website |
| 2 | Lithuanian State Research Institutes Directors’ Conference | |
| 3 | Association “Santaka Valley” | Website |
| 4 | Lithuanian Nuclear Energy Association (BEA) | |
| 5 | Lithuanian Association for Energy Economics | Website |
| 6 | Lithuanian biomass energy association LITBIOMA (LITBIOMA) | Website |
| 7 | Lithuanian Electricity Association (LEEA) | Website |
| 8 | Lithuanian Engineering Industries Association (LINPRA) | Website |
| 9 | Lithuanian Research Library Consortium (LMBA) | Website |
| 10 | Lithuanian Thermotechnical Engineer’s Society (LIŠTIA) | |
| 11 | National Lithuanian Energy Association | Website |
| 12 | Lithuanian Association for Hydrogen Energy | Website |
| 13 | Smart Energy Digital Innovation Hub | Website |
| 14 | Lithuanian Hydrogen Platform | Website |
| 15 | Lithuanian Confederation of Industrialists (LPK) | Website |
| 16 | Lithuanian Solar Energy Asssociation (LSEA) | Website |
| National clusters | ||
| 17 | Biopower Plants Development Cluster | Website |
| 18 | Food Technologies Digitalization LT Cluster | Website |
| 19 | Smart Technology Cluster (SMARTTA) | Website |
| 20 | LNG Cluster | Website |
| 21 | International Energy Cluster | Website |
| International | ||
| 22 | European Energy Research Alliance | Website |
| 23 | European Association of Research and Technology Organisations (EARTO) | Website |
| 24 | The European Association of National Metrology Institutes (EURAMET) | Website |
| 25 | European Network of Freshwater Research Organisations (EurAqua) | Website |
| 26 | European Safety, Reliability & Data Association (ESReDA) | Website |
| 27 | European Technical Safety Organisations Network (ETSON) | Website |
| 28 | Sustainable Nuclear Energy Technology Platform (SNETP) | Website |
| 29 | Implementing Geological Disposal of Radioactive Waste Technology Platform (IGD-TP) | Website |
| 30 | The FuseNet Association | Website |
| 31 | CERN Baltic Group | Website |
| 32 | Industrial Alliance on Small Modular Reactors | Website |
| 33 | European Atomic Energy Society | |
| 34 | European Association of Research Managers and Administrators (EARMA) | Website |
| 35 | International Measurement Confederation (IMEKO) | Website |
| 36 | European Research Community On Flow, Turbulence and Combustion (ERCOFTAC) | Website |