Does you company needs help with industrial systems integration?

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Our main activity is to automate processes and increase safety and productivity. We do it through systems’ integration, which means using subsystems independent from each other and make them work as a one and only system with a determined function, by means of specific hardware and software.

Solutions for your company

We provide equipment and / or skilled labor according to your needs.


Procurement is the process of obtaining goods, services or works from an outside source, often through a competitive bidding process or solicitation of bids. Through our procurement services, we evaluate and select the best suppliers, negotiate bids, manage contracts, support the purchase and installation of products and services, and finally evaluate the entire process.

System integration

Industrial system automation creates a highly integrated digital environment that meets the demands of an increasingly crowded market. Other benefits of system integration include cost and waste reduction. With the help of system integration, including Supervisory Control and Data Acquisition (SCADA), Distributed Control Systems (DCS), and other control systems, we enable our customers to achieve simpler and optimized workflows.


The ATEX Directive was developed to ensure the safe use of equipment in potentially explosive environments and to reduce the risk of explosions and other accidents that can lead to injury or damage. Through our services, we provide the identification and implementation of equipment and procedures to prevent the formation of explosive atmospheres in accordance with the EU ATEX Directive.

Automation and Systems

Industrial automation is the use of electronic devices, computers, and other advanced technologies to optimize industrial production. We not only develop PLC software, HMI/SCADA, but also TAS, CCTV, intercom, F&G (Fire and Gas) system, ESD (Emergency Shutdown). The aim is to automate processes and improve safety and productivity. We integrate standard subsystems to work as a unit and to be transparent to the user.


We provide system automation solutions for various industries, from oil and gas to automotive, marine, food and packaging. Our services include design and implementation of automation and robotic systems, integration of complex IT solutions, supervision services, platforms as a service, software as a service, infrastructure as a service, IIoT solutions, flexible production systems, including remote access to plants.


Industrial devices use sensors, control systems and other devices to measure and control the conditions of industrial processes. These processes can be automated and systems optimized for greater efficiency and security. We provide install and integrate solutions from calibrators to valves and load/unload systems with the right software.


The purpose of calibration is to ensure that your device is making accurate and consistent measurements over time and to identify and correct any errors or discrepancies that occur. We provide calibration services according to the ISO 9000 standard to ensure correct and safe use of your devices.

Industrial Maintenance

Industrial maintenance is an important aspect for the safe, efficient and reliable operation of industrial plants. We provide industrial maintenance services with a team of technicians and engineers who maintain and repair facilities and systems. Having an effective maintenance program in place is critical to minimizing downtime and keeping your equipment running smoothly.

What our customers say

“I recommend PLEXUS whenever I can because I recognize the good work and have full confidence in the final results.”

Patrick Almeida, ROTORK

“I recommend it for the quality services and expertise.”

Joaquim Rodrigues, PRIO ENERGY

“I recommend PLEXUS due to the trust I have in the professionals who work there.”


“I recommend it for the competence, professionalism, and deep technical knowledge.”

Luís Espada Gonçalves, GALP ENERGIA

“I recommend them with a favorable assessment from 3 contracts in the facilities of TGLS (Bulk Liquids Terminal Sines).”


“I trust the technical capabilities of the company.”

Bruno Ribeiro, BIOVEGETAL

“Good personal and professional opinion.”

Júlio Martins, EDP

“Congratulations for your collaborations with schools and polytechnics. We should have many more companies with this vision involved in teaching.”

Jorge do Carmo, ETLA

“I confirm the professionalism and quality in the services provided by PLEXUS and I emphasize the technical capacities of this organization.”

Marcos Lima, ECOSLOPS

“I recommend for the competence and honesty.”

Mário Almeida, EURORESINAS

“I recommend them due to their response to the needs of the Parque da Boa Nova.”

Laurindo Ferreira, GALP ENERGIA

“I recommend for the prompt answer and their good solutions in the industrial market.”

Rui Dias, NESTLÉ

“I recommend them for always being ready to help, no matter what time is it.”

Nuno Salvado, GALP ENERGIA

“I recommend their competence, professionalism and proven availability.”

António Teixeira, GALP ENERGIA

“I recommend due to the high technical knowledge together with the zeal and accuracy in execution of works. Very focused people and receptive to the customer’s needs. Totally recommendable.”

Edgar Guerreiro, ENERFUEL

“I recommend them because they are professionals. They are people of trust, integrity and quite affordable.”

Bernardino Silva, GALP ENERGIA

“I recommend for the availability and professionalism.”
Augusto Martins, GALP ENERGIA

“A company with very experienced and specialized professionals in their area of actuation. For the historical of our relationship with PLEXUS, I consider it one of our Win-Win partnerships.”

Mário Guterres, GPI-ENGENHARIA

“Competent professionals with appropriate solutions to customer needs. Always available. They are an excellent company to have as a partner.”

Vítor Liberato, GALP ENERGIA

“I recommend them for the confidence that they capture, through their knowledge and experience.”

Paulo Mestre, REN

“I recommend their competence and availability.”

Francisco Pereira da Costa, REPSOL

“They always respond to inquiries. Proposals received are always grounded and coherent.”

Clara Louro, SICE

“I recommend for always being available for clarifications, with prompt reply to the emails, as well and a kind and top level communication.”

Frederico Vicente, SINAGA

“The common goals is the base of success and the relationship between GALP and PLEXUS reflects such partnership. […] Your readiness and availability has great impact in our business.”

Nuno Pereira de Oliveira, GALP ENERGIA

“It is a trustworthy company and a great partner.”


I worked for Plexus on a project in Loures where I interacted with several of their employees. I was very impressed with their professionalism. The same applies to the human resources at the headquarters, always available to help.

Nelson Tiago, Independent Professional

I didn’t work directly with Plexus, but I endorse it; they are exceptional people! Whenever I visited PLEXUS, there was always a great atmosphere among the employees. Congratulations, and I wish them a lot of success.

Liliana Chaínho, Millennium BCP

“Great day, super professional and competent team.”

Pedro Mendes Manteiga, ASU Plant Technician at Linde

International Society of Automation
International Society of Automation
International Society of Automation
Pagamento Pontual
International Society of Automation
Pagamento Pontual