Energy

Leading the change towards a more sustainable future.

Líneas de Negocio - Energía

Telecommunications

Advanced solutions for a constantly evolving market.

See more

Special Projects

Advanced solutions for a constantly evolving market.

See more

Energy

Líneas de Negocio - Energía

Telecommunications

Special Projects

Welcome to SEMI

Tradition, experience, and future.

Over 100 years driving the electrical and industrial sectors through innovation, excellence, and quality in all our services.

Learn more

Key Figures 2024

0M€

Annual Production

Professional Employees

Our Clients

Clients with whom we have shared successes and goals.

Business Lines

Líneas de Negocio - Energía

Energy

The energy sector faces increasingly pressing challenges, such as the need to address growing energy demand driven by consumption in the most prosperous countries and the emerging needs of developing nations.

Learn more

Telecommunications

SEMI began its Telecommunications activity in the 1950s, participating in the construction of Television, Telephone, and Radio networks. Today, we have extensive experience in deploying Fiber Optic Networks and Mobile Telephony Networks.

Learn more
Líneas de Negocio - Telecomunicaciones
Líneas de Negocio - Telecomunicaciones

Special Projects

Over time, SEMI has excelled in the execution of specialized civil works, with a particular focus on projects for the Armed Forces, industrial facilities, and demolition and dismantling works, among others.

Learn more

Featured Projects

Explore our most outstanding projects

View all projects

D-B Anti-Fod Repairs

Specialized Civil Works

D-B Anti-Fod Repairs

The primary objective of this project is to protect aircraft from Foreign Object Damage (FOD). To achieve this, a Design and Construction project was carried out at the Rota Naval Base Airport, involving improvements to the shoulders of the runway and taxiway, as well as a new Drainage System based on the modification and expansion […]

View Project
Broadband Network in Peru

Wireless Networks

Broadband Network in Peru

SEMI has participated in the construction of 140 nodes to enable broadband network access in the regions of Cuzco and Ayacucho. The project is part of the strategic initiatives of the Ministry of Telecommunications of Peru, aimed at delivering fiber optic connectivity to rural areas to provide coverage for both individuals and institutions. To date, […]

View Project
PE Puelche Sur

PE Puelche Sur

A 160 MW wind farm fully constructed by SEMI. The work included civil, electrical, and mechanical works for the installation of 33 generators and a step-up substation.

View Project
PFV Miraflores

PFV Miraflores

Construction of three photovoltaic plants with a total capacity of 32.8 MW, featuring single-axis tracker structures, delivered under a turnkey contract, including operation and maintenance services.

View Project
Repowering of the 220 kV Maitencillo-Cardones Line

Repowering of the 220 kV Maitencillo-Cardones Line

Engineering and assembly to increase capacity along 132 km of the 220 kV Maitencillo-Cardones Line. The work involved the installation of extensions, replacement of supports, and insulation changes using Live-Line Work Techniques.

View Project
PE Andella

PE Andella

A 50 MW wind farm, with works consisting of civil construction, as well as electrical infrastructure and power evacuation systems.

View Project
CONSOLIDATE CE ADMIN FACILITIES

CONSOLIDATE CE ADMIN FACILITIES

The project involved the complete renovation (exterior architecture, interior architecture, electrical work, mechanical installations, fire protection system installation, etc.) of the administration building at the Morón Air Base. Noteworthy is the waste management and the inclusion of the asbestos removal protocol in the execution process.

View Project
SEMI Around the World

España

Francia

Alemania

Rumanía

Israel

Arabia Saudita

Chile

Panamá

El Salvador

República Dominicana

México

Marruecos

Uruguay

Perú

Grecia


7 March 2025

News

Nueva adjudicación en Sevilla

El pasado 19 de diciembre de 2024 se nos comunicó oficialmente la adjudicación del proyecto de JRC/SVQ/2023/RP/1865 – OBRAS DE CONSTRUCCIÓN DEL NUEVO EDIFICIO DEL JRC EN SEVILLA, impulsado y financiado por la Comisión Europea.  De mano de la constructora San José, con la que vamos en UTE, la Delegación de SEMI Proyectos Especiales Europa […]


27 November 2024

News

We Made Changes to One of the Main Cell Towers in Cambados

We upgraded one of Cambados’ main cell towers to adapt it for 5G technology.SEMI successfully completed a project for Vantage Towers to adapt the infrastructure for the installation of new 5G antennas. You can read the news in Diario de Arousa. A massive crane in the center of Cambados caught the attention of passersby. SEMI […]


27 November 2024

News

SEMI Awarded for Its Business Excellence

Last Friday, October 4th, the second edition of the “Awards for Business Excellence” gala took place at the Atalaya Museum in Jerez de la Frontera. The event, organized by Rino Alquileres, Cesma Maquinaria, and the financial institution IberCaja, honored SEMI with the award for “Professional Career.” The ceremony, hosted by Enrique Gallego, presenter for the […]