| Quality Assurance manager | Daiva Šiaučiūnienė | 228-AK | +37037401808 | Daiva.Siauciuniene@lei.lt |
| Internal auditor | Rita Polianskienė | 207-AK | +37037401803 | Rita.Polianskiene@lei.lt |
| General inquiries | Administration | 203-AK | +37037401805 | lei@lei.lt |
| Media Inquiries | Communications | +37037401826 | info@lei.lt | |
| Head of Document Management Department / Lawyer | Arūnė Knašienė | 224-AK | +37037401810 | Arune.Knasiene@lei.lt |
| International Cooperation Coordinator | Monika Inčerytė | 208-AK | +37037401842 | Monika.Inceryte@lei.lt |
| Communication and Public Relations manager | Simonas Mikalauskis | 223-AK | +37037401826 | Simonas.Mikalauskis@lei.lt |
| Head of Accounting | Giedrė Šeškauskaitė | 225/1-AK | +37037401822 | Giedre.Seskauskaite@lei.lt |
| Head of Personnel and Legal Department | Vaida Bansevičienė | 217-AK | +37037401811 | Vaida.Banseviciene@lei.lt |
| IT service | 104-AK | +37037401854 | it@lei.lt | |
| Manager of R&D and Innovation Transfer Centre | Agnė Bertašienė | 328/1-AK | +37037401865 | Agne.Bertasiene@lei.lt |
| Project Manager | Rimantas Levinskas | 122-AK | +37037401804 | Rimantas.Levinskas@lei.lt |
| Head of the Facilities Department | Sigitas Masaitis | 114/1-AK | +37037401917 | Sigitas.Masaitis@lei.lt |
Laboratory of Heat-Equipment Research and Testing (12)
Laboratory of Combustion Processes (13)
Nuclear Engineering Laboratory (14)
Plasma Processing Laboratory (15)
Laboratory of Materials Research and Testing (16)
Laboratory of Nuclear Installation Safety (17)
Center for Hydrogen Energy Technologies (18)
Smart Grids and Renewable Energy Laboratory (21)
Laboratory of Energy Systems Research (31)
Laboratory of Hydrology (33)