
Planning and construction of energy technology infrastructure: Photovoltaics, grid construction, plant construction, traffic technology, and fiber optic technology.

GLS Energie GmbH
4060 Leonding (Headquarters) · 4320 Perg (Legal Department)New on Amplifa
About GLS Energie
GLS Energie GmbH is an independent sister company of GLS Bau und Montage GmbH, founded in 2012, with its headquarters in Leonding, Upper Austria. The company operates as an energy technology infrastructure and full-service provider, covering the entire value chain from design and planning through execution to maintenance and upkeep. Core business areas include photovoltaic systems (ground-mounted and rooftop systems), grid construction and overhead lines (including 20-kV to 110-kV projects), electrical and plant construction with low-voltage switchgear, high and medium-voltage distributions, transformers and grid replacement systems, as well as traffic technology, civil engineering, and fiber optic and data technology (fiber optic splicing technology, FTTH). Customers come from energy infrastructure, transport and highway infrastructure, telecommunications, public sector, industry, and water supply, including Asfinag, Tauernwindpark, and Water Supply Linz. Quality is ensured by a certified quality management system according to ÖNORM EN ISO 9001 and RoHS compliance. Projects are planned and coordinated from Leonding and realized nationwide in Austria.
- Site
- Leonding
- Processes
- Photovoltaic Systems (Construction of PV systems, ground-mounted and rooftop systems), Industrial interior lighting, effect lighting, and LED street lighting (Installation), Grid construction and overhead line construction (including 20-kV and 30-kV overhead lines, tower, Electrical and plant construction (Planning, execution, maintenance, upkeep), General electrical installations, Low-voltage switchgear, High and medium-voltage distributions, Transformers
- Materials
- Photovoltaic Systems, Grid Construction and Overhead Lines, Electrical and Plant Construction, Traffic Technology, Civil Engineering, Fiber Optic and Data Technology, Lighting
- Certificates
- ÖNORM EN ISO 9001, RoHS Compliance
- Founded
- 2012
- Industries
- Energy Infrastructure, Traffic/Infrastructure (Motorway, Tunnel), Telecommunications/Broadband, Public Sector, Industry, Water Supply
- 01
Design and Planning
- 02
Civil Engineering and Cable Laying
- 03
Electrical and Plant Construction (Installation)
- 04
Commissioning
- 05
Maintenance and Upkeep
Services and Procedures
Photovoltaic Systems
Construction of ground-mounted and rooftop systems, including on motorway enclosures and industrial roofs.
Grid Construction and Overhead Lines
Construction of 20-kV to 110-kV grids including tower changes and wiring.
Electrical and Plant Construction
Low-voltage switchgear, high and medium-voltage distributions, transformers, grid replacement systems, as well as strong and weak current installations.
Traffic Technology
Traffic control systems, sign bridges, emergency call systems, tunnel radio, and barrier systems.
Civil Engineering
Excavation work, trenchless cable laying, horizontal drilling, and foundations for masts and traffic sign bridges.
Fiber Optic and Data Technology
Fiber optic splicing and measurement technology, backbone and FTTH connections, and structured cabling.
Lighting
Industrial interior lighting, effect lighting, and LED street lighting.
Locations

Leonding
ATHeadquarters: Office, warehouse, and assembly hall, outdoor storage; Design and Coordination
Perg
ATLegal Department / Original founding site
Projects and Plants









Inside the production





Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Photovoltaic Systems (Construction of PV systems, ground-mounted and rooftop systems)Installation | – | – | – | – | – |
| Industrial interior lighting, effect lighting, and LED street lighting (Installation)Installation | – | – | – | – | – |
| Grid construction and overhead line construction (including 20-kV and 30-kV overhead lines, towerInstallation | – | – | – | – | – |
| Electrical and plant construction (Planning, execution, maintenance, upkeep)Installation | – | – | – | – | – |
| General electrical installationsInstallation | – | – | – | – | – |
| Low-voltage switchgearInstallation | – | – | – | – | – |
| High and medium-voltage distributionsInstallation | – | – | – | – | – |
| TransformersInstallation | – | – | – | – | – |
| Central power supply systemsInstallation | – | – | – | – | – |
| Strong and weak current installationsInstallation | – | – | – | – | – |
| Pump stationsInstallation | – | – | – | – | – |
| Grid replacement systemsInstallation | – | – | – | – | – |
| Construction electricity connectionsInstallation | – | – | – | – | – |
| Maintenance and service servicesInstallation | – | – | – | – | – |
| Traffic technology (Traffic control systems VBA, sign bridges, information displays,)Installation | – | – | – | – | – |
| Civil engineering (Excavation work, cable ducts, trenchless cable laying, horizontal drilling,)Engineering | – | – | – | – | – |
| Fiber optic and data technology (Fiber optic splicing and measurement technology, backbone and FTTHInstallation | – | – | – | – | – |
| Design, planning, and coordination of projects (Full-service energy technology infrastructure)Engineering | – | – | – | – | – |
Additional services
Reference customers
Quality
Consistent quality in design, execution, and support is ensured by a certified quality management system according to ÖNORM EN ISO 9001 and RoHS compliance.
| Evidence | Leonding |
|---|---|
| ÖNORM EN ISO 9001 | |
| RoHS Compliance |
History
- 2012
Founding of GLS Energie GmbH with its seat in Perg as an independent sister company of GLS Bau und Montage GmbH.
- 2013
Acquisition of the grid construction business area from GLS Bau und Montage GmbH.
- 2016
Relocation of the headquarters and taking occupancy of the new central facility in Leonding with office, warehouse, and assembly hall as well as outdoor storage.
- 2024
Implementation of the largest PV system of Asfinag on the Trebesing enclosure (A10) with 2200 PV panels.
- 2025
Overhead line abstraction of the 20-kV overhead line in the Ötschergräben.