- 50people in our own installation team
- 100%in-house staff, trained and certified by MIESA
- ATEXteam trained for hazardous areas
- 40+years in industrial installation
Few companies in our sector have their own 50-person installation team. They are our own staff, trained in our quality and safety standards, which allows us to respond quickly on new builds, plant shutdowns and revamping, and to scale up when a project requires it.
Grupo Miesa was founded in 1983 in industrial installation, to serve the chemical and heavy industry of Bizkaia. Since then we have carried out electrical, instrumentation and electromechanical installation in complex industrial environments, always to the highest standards of quality, safety and sustainability (ISO 9001 · ISO 14001 · ISO 45001).
ATEX area specialists
We carry out installations in classified areas with explosion risk, complying with the ATEX directive, international standards and industrial safety protocols, with a team trained to work in critical conditions.
Installation services
Industrial electrical
- Installation and connection of panels and MCCs
- Medium-voltage switchgear
- MV/LV cabling, terminations and joints
- Cable routes, trays and busbar trunking
- Industrial lighting
Instrumentation and automation
- Instruments and impulse lines
- PLCs and control systems
- Instrument air
- Fire protection systems
Electromechanical
- Overhead cable routes and outdoor installation
- Skid installation
- Panels in exposed environments
- Custom solutions
Commissioning and testing
- Coordination with engineering on site
- Loop and functional tests
- Commissioning support
Experience by sector
- Oil and petrochemicals: Petronor, Repsol, Técnicas Reunidas — new plants, revamping, control rooms and shutdowns
- Chemicals: Smurfit Kappa, Kem One, BASA, Bunge, ASK…
- Energy: Bizkaia Energía (Boroa and Zierbena)…
- Food: hygienic environments for manufacturers such as GEA (dairy, soft drinks, beer)

Recent success stories
01
New cheese plant
- MCCs, drives, PLC and communications cabinets
- Design and installation of cable routes
- Laying and connection of power and control cables
02
Kem One – Elyse project
Complete installation of the instrumentation for the new membrane electrolyser unit, which cuts CO₂ emissions by more than 50,000 t a year.
- Field instrumentation, gas detection and fire protection
- Instrument air and cable routes
- Loop testing and troubleshooting
03
Repsol – 2.5 MW electrolyser
- Industrial lighting
- Process instrumentation
- Overhead cable routes and MV, LV and control cabling
04
Reactor unit for SBR
- Instruments, racks and junction boxes
- Instrument air system
- Control and power cabling and lighting



