about us


SEI – INGENIERÍA, EQUIPOS Y MONTAJES ELÉCTRICOS, S.L. is a service company for the industry that develops its activity in the electricity sector, applying its knowledge and good practice in all its divisions: engineering, equipment manupacturing, assemblies, automation, industrial communications and y maintenance.


SEI, S.A. was constituted in the year 1977 in Bilbao, by the initiative of some entrepreneurial professionals specialized in the equipment of cranes, ovens and machinery in general.

In the mid-1980s, it introduced the first programmable controllers in its equipment, evolving into a service company for the industry.

Since then, SEI has grown and evolved over time keeping us at the forefront of the industry, applying the technology innovation to engineering, manufacturing, control and management systems within the Industry 4.0 framework.

In the year 2018, SEI, S.A. it becomes SEI S.L. with the aim of improving self-management and the quality of service offered to our customers.


SEI, S.L. is currently cetified by OCA Institute of certification, S.L.U. in the following standars:

Human Team

SEI is a service company with a vocation to respond to the needs of our customers with specific value-added solutions.That is why the main asset of SEI is the human team. This team, versatile and with extensive experience, currently consists of:

Graduates in electrical engineering and telecommunications.

Senior technicians in PRL.

Proyectists and draughtsmen.

Managers, construction managers and officers.


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