| Sustera Oy CVR 0905045-0 | BoardBoard of Directors | Since 2026 | — | Active |
| Versowood Oy CVR 1080944-4 | BoardBoard of Directors | Since 2019 | — | Active |
| Oy Botnia Mill Service Ab CVR 1105134-8 | BoardChairperson | Since 2020 | — | Dissolved |
| Elcoline Industrial Service Oy CVR 1807816-4 | BoardBoard of Directors | Since 2024 | — | Dissolved |
| Sustera HVAC Design Oy CVR 2157559-1 | ManagementChief Executive Officer | Since 2026 | — | Active |
| Elcoline Power Oy CVR 2234802-4 | BoardBoard of Directors | Since 2024 | — | Dissolved |
| Elcoline Construction Oy CVR 2481283-9 | BoardBoard of Directors | Since 2024 | — | Dissolved |
| Wind Controller JV Oy CVR 2496484-0 | BoardChairperson | Since 2022 | — | Dissolved |
| TMV Service Oy CVR 2518216-2 | BoardChairperson | Since 2023 | — | Dissolved |
| Helen Oy CVR 2630573-4 | BoardBoard of Directors | Since 2026 | — | Active |
| Sustera Holding Oy CVR 2653970-9 | ManagementChief Executive Officer | Since 2026 | — | Active |
| TMV Line Oy CVR 2679018-6 | BoardChairperson | Since 2023 | — | Dissolved |
| Pilothouse Advisory Oy CVR 2712879-2 | BoardBoard of Directors | Since 2015 | — | Active |
| Sustera Energy Consulting Oy CVR 2764619-4 | BoardBoard of Directors | Since 2026 | — | Active |
| WT-Service Oy CVR 2950397-1 | BoardChairperson | Since 2022 | — | Dissolved |
| Sustera Group Oy CVR 2950409-3 | BoardBoard of Directors | Since 2026 | — | Active |
| WiCo Inspections Oy CVR 3115033-5 | BoardChairperson | Since 2022 | — | Active |
| WiCo Safety Oy CVR 3115034-3 | BoardChairperson | Since 2022 | — | Active |
| Sustera Climate Solutions Oy CVR 3235730-3 | BoardBoard of Directors | Since 2026 | — | Active |
| Sustera International Oy CVR 3287706-9 | ManagementChief Executive Officer | Since 2026 | — | Active |
| Sustera NewCo Oy CVR 3631816-8 | BoardBoard of Directors | Since 2026 | — | Active |
