Power delivered intelligently and efficiently to clients

Solutions for electricity transmission and distribution (from low to very high voltage), electricity generation (development and construction of substations) and, moreover, energy management (visible and measurable network).

Power Substation

Construction and installation of substations in turnkey model or within the structure of the General Electrical Installation VHV/ MV/LV

Network Operations - Power

We implement and operate VHV, HV, MV and LV lines

Distributed Generation

We provide energy efficiency solutions using the self-consumption model or small production units

Fiber solutions for overhead cable networks

We develop fiber solutions for aerial transmission lines

Network Engineering - Power

Infrastructure projects of power transmission and distribution lines

Fixed Nework Operations

From the heavy lifting to the more meticulous work, we cover all phases of fiber optic implementation

Mobile Network Operations

We work withall technologies: GSM, DSC, UMTS, WIFI, LTE, GSM-R, 5G

Data Center

Proef designs and implements data centre infrastructures for all industries

Network Operations Center (NOC)

Monitor, identify, investigate, prioritize, and resolve issues that may affect the network

eneida DeepGrid®

Collaborative IoT platform to remotely and online optimize the condition and operation of critical network assets


Reinforced telecommunications antenna able to "survive" forest fires


We provide mobile power generators for emergencies


Industrial maintenance tool using augmented reality

Photovoltaic Farms

We provide the market with the best integrated solutions in the production of energy from renewable sources (solar, wind, hydro)

Wind Energy

We provide the market with the best integrated solutions in the production of energy from renewable sources (solar, wind, hydro)


Direct sales and distribution of telecommunications and energy products and services to the residential and business segment

EV charging stations

Proef is certified by Mobi.e to design and install charging stations for electric vehicles for business

Cadastre of infrastructures

Infrastructure cadastre for wastewater or rainwater, telecommunications, gas or electricity networks.

Solar Panel Installation

We offer turnkey solar panel installation solutions for companies.
See all solutions

Success Stories

Because the success of our customers is also ours.

Proef Ecosystem

An ecosystem that goes far beyond simple connectivity.

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News See all
Improvement of telecommunications infrastructures in Angola
Telecom Power Cities Corporate
16 April 2021 Proef is working with Unitel, the largest Angolan telecommunications operator, to improve its telecommunications stations' energy efficiency.
Proef-MMCI Partnership
Telecom Power Cities Corporate
16 April 2021 With confidence and optimism in the Portugal telecommunications market's future, Proef established a partnership with MMCI Multimédia.
Proef seals partnership with EnBW
Power Cities Corporate
15 April 2021 Proef and EnBW, the third largest energy supplier in Germany, took another step in their relationship through a two-year partnership agreement.
Proef is involved in Galp's first solar project in Portugal
20 May 2021 Galp starts the construction of its first large-scale photovoltaic solar energy project in Portugal, in the Municipality of Alcoutim. Proef's mission is to build a very high voltage (150kV) line.
A new project of overhead power lines in Sines
09 June 2021 Proef, in partnership with Geometric Talks, is involved in the engineering project for the 30kV and 400kV overhead power lines of the Morgavel Wind Farm, in Sines.
Proef's summer internship program is back!
Telecom Power Cities Corporate
21 June 2021 Proef's summer internship program is back and will feature students that want to have the first experience in the labor market.
Excellence awards - Electrotechnics technical course
Telecom Power Cities Corporate
05 July 2021 Proef rewards the best student from de electrotechnics technical course of the D. Sancho I school, for the 2nd year in a row.
21 July 2021 Proef is working alongside EDP Renováveis in the construction of the High and Very High Voltage lines of the Sincelo Wind Farm.
Eurico Ferreira Academy
Power Corporate
08 September 2021 Eurico Ferreira Academy keeps surprising in 2021 and trains 313 trainees in the areas of energy and telecommunications.
Proef reinforces its commitment to training its employees
Telecom Power Cities Corporate
21 October 2021 Proef reinforces its commitment to training its employees and provides training in operation and driving of forklifts.
Uprating Bouça Line – Zêzere 1
15 November 2021 The remodeling and uprating of the Bouça Line – Zêzere 1, at 150kV, was concluded, together with REN and EIP.
Trainee Program - Engineering
Telecom Power Cities Corporate
16 November 2021 Proef's Trainee Program is back to receive professionals in the areas of Engineering, on a professional internship.
The Tension Work course - Very High Voltage at the Eurico Ferreira Academy comes to an end
Telecom Power
28 January 2022 The year 2021 ended at the Eurico Ferreira Academy with the Tension Work course – Very High Voltage – Potential Method.
Everything you need to know about Data Centers
Telecom Power Cities Corporate
17 February 2022 A data center, also known as a data processing center, is characterized as a physical building that companies use to house information that is of great relevance to their business.
Photovoltaic Solar Panels - Business Self-consumption
Power Cities Corporate
13 April 2022 Ask for an estimate now to install photovoltaic solar panels in your company and reduce the price of your electricity bill.
Ready to take a leap?
Telecom Power Cities Corporate
14 June 2023 If you want to have your first contact with the job market, this is your opportunity.
Basic Life Support | Course
Telecom Power Cities Corporate
15 July 2022 As our premise is "Safe, always." We invite our employees to take the "Basic Life Support" course.
Proef DNA 2022
Telecom Power Cities Corporate
03 August 2022 Proef DNA is to employees who have excelled exceptionally during the year, based on three essential pillars: Ambition, Leadership, and Innovation.
Proef member of APE
23 January 2023 Proef is a member of the Portuguese Energy Association, representing Portugal in the World Energy Council.
Proef DNA 2023
Telecom Power Cities Corporate
16 June 2023 The Proef DNA Award is based on three essential pillars, ambition, leadership and innovation. Meet the winners.
Managers' Meeting '24
Telecom Power Cities Corporate
02 February 2024 The beautiful city of Aveiro welcomed Proef to our Managers' Meeting.
Beyond Values & Variables: Data Science & Big Data
Telecom Power Cities Corporate
04 March 2024 On 27th February, Proef and the CCG/ZGDV Institute organised an event for startups and SMEs with a focus on the digital transition.