Electricity supply security is a critical challenge for every country. The rapid integration of renewable and intermittent energy sources is transforming power grids and increasing the need for resilient, flexible transmission infrastructure. As a leading underground transmission line contractor, Omexom supports transmission system operators in designing, building, and maintaining high-voltage underground power lines worldwide.
With extensive experience in complex environments, Omexom delivers HV underground transmission solutions that strengthen grid resilience, optimize land use, and ensure long-term reliability—particularly in urban, constrained, or environmentally sensitive areas.
Modern power networks must handle increasing demand while withstanding climate risks and space constraints. High voltage underground transmission lines offer decisive advantages:
As an underground transmission line contractor, Omexom provides end-to-end expertise to help grid operators futureproof their networks and meet evolving energy challenges.
Omexom operates as an independent EPC underground transmission line contractor, capable of delivering turnkey projects regardless of cable manufacturers or technologies. This independence allows us to adapt each project to client specific technical, regulatory, and environmental requirements.
From early engineering to commissioning and maintenance, our teams manage the entire project lifecycle with a strong focus on safety, quality, and performance.
Our engineering teams deliver optimized solutions for high-voltage underground transmission lines through:voltage underground transmission lines through:
As a specialized underground transmission line contractor, Omexom masters’ complex civil works, including:
To ensure long-term reliability of HV underground transmission assets, Omexom provides:term reliability of HV underground transmission assets,
Omexom brings advanced technical expertise to complex underground transmission projects, including:
These capabilities reinforce our position as a trusted underground transmission line contractor for critical infrastructure.
Our turnkey EPC services cover every phase of underground transmission line execution:
Country: Benin
Client: Ministry of Energy of the Republic of Benin
Scope: HV transmission scope covering over 300 km of double-circuit lines, including underground and aerial routes at 161 kV and 63 kV.
Dates: 2023
Business Unit: Omexom in Benin
Country: Scotland / UK
Client: Zenobē
Scope: Design and construction of 400 kV underground cable routes, substations and BESS foundations, and associated civil and electrical works, including earthing and commissioning.
Dates: 2024-2026
Business Unit: Omexom in UK
On May 27th, 2021, Omexom teams in Senegal and Morocco commissioned the very first full digital 225 kV high voltage substation on the african continent.
Omexom is working on part of the power line between Crete and the Peloponnese, including the 15 km underground line that connects the substation in…
