Zener

What Zener does

Zener (Grupo Zener), founded in Spain in 1982 and headquartered in Valladolid with an operations center in Tres Cantos (Madrid), is a private, vertically integrated field-services group that installs and maintains telecommunications and energy infrastructure for enterprise customers. The group operates through six business lines: Telecommunications (fixed, mobile 2G-5G, radio, satellite, digital TV), Renewable Energies and Electric Mobility (solar plants, photovoltaic self-consumption, EV charging), Civil Works and Construction, Security and Alarms, Data Centers, and Monitoring & Remote Management. Its proprietary Smart Site® platform provides remote site management and fault prediction for mobile telecommunications infrastructure, and Service Desks provide 24/7 network and service monitoring, supporting a managed-services layer on top of one-off installation work.

The group serves tier-1 telecom operators (Deutsche Telekom, Vodafone, Telefonica, Orange/MasOrange), tower companies (Cellnex, American Tower, Vantage Towers), energy companies (Iberdrola, Endesa, Naturgy, Acciona), and security firms (ADT, Securitas Direct). Zener employs 7,000-7,500+ professionals, runs 70+ establishments across Spain, Germany, Chile, the Netherlands, Portugal, and Italy, and executes projects in 12+ countries across four continents. The business model is predominantly B2B professional services delivered via direct enterprise sales, with project-based pricing and an expanding managed-services component.

Recent strategic activity includes a 2024 acquisition of COMFICA Soluciones Integrales S.A. assets in Spain, sequential international expansion from 2017 through 2022, and an extensive certification footprint (ISO 9001/14001/45001/50001/27001, ENS, BRL 7000, SOA OS19) that underwrites eligibility for major operator and public-sector tenders. Ownership is concentrated with the founding group; the parent entity is Zener Encitel, S.L., with no identified external institutional investment or public listing.

Name

Zener

Legal name

Zener Encitel, S.L.

Website

https://zener.es

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Zener (Grupo Zener) is a Spanish private field-services group that installs and maintains telecommunications networks, renewable energy infrastructure, data centers, and security systems for tier-1 telecom operators, tower companies, and utilities across 6 headquartered and 12+ project countries, employing 7,000-7,500+ technical professionals.

Ownership category

akta.pro rank

Product category

Telecommunications Infrastructure Services

NAICS

Computer Facilities Management Services (541513), Computer Systems Design Services (541512), Computer Systems Design and Related Services (54151)

SIC

Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

Cloud-Managed & Managed Security Systems Services (Remote Monitoring, Maintenance) (BPAKAGAJ)

akta.pro secondary industries

Chillers, Boilers & Central Plant Operations (BPABACAG), Cloud Managed Services (Operations, Monitoring, Patching) (BPAEACAF), Security, Safety & Fire/Life Safety Management (BPABAAAE)

Keywords

• Telecom infrastructure installation
• Renewable energy services
• Mobile network deployment
• Fiber optic networks
• Civil construction works

Headquarters

HQ city

Madrid

HQ country

Spain

HQ region

Europe

Offices14 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Supply Chain, Marketing or Sales

Revenue model

1. Telecommunications Services: Installation and maintenance of telecommunications networks including FTTH, mobile networks (2G-5G), radio networks, satellite, and digital television infrastructure
2. Renewable Energy and Electric Mobility: Solar plant installation, electric vehicle charging points, photovoltaic self-consumption systems, industrial electrical and lighting services
3. Civil Works and Construction: Telecommunications network deployment, site adaptation, photovoltaic plant construction, integral security systems, urban and inter-urban ducting, building construction
4. Security and Alarms: Security and alarm systems, home automation, fire protection systems installation and maintenance
5. Data Centers: Data center design, civil works, construction and installations, HVAC and energy systems, IT equipment, security and control, management and monitoring systems, maintenance
6. Monitoring and Remote Management: Mobile site management (Smart Site®), service desks, network and service monitoring, fault prevention and prediction, network and service inventory, provisioning management and activation processes

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Zener provides end-to-end installation, deployment, and maintenance services for telecommunications infrastructure (fixed, mobile, radio, satellite, digital TV networks) and renewable energy systems (solar plants, EV charging, photovoltaic). The company also delivers civil construction, security and alarm systems, data center solutions, and remote monitoring services through its proprietary Smart Site® platform. Projects span the full lifecycle from engineering and deployment through provision and ongoing maintenance for enterprise clients.

Product overview

Zener is a telecommunications and energy solutions company offering an integrated portfolio of six interconnected business lines. The core offerings include Telecommunications (fixed/mobile network infrastructure), Renewable Energies & Electric Mobility (solar plants, EV charging), Civil Works & Construction, Security & Alarms, Monitoring & Remote Management (including proprietary Smart Site® solution), and Data Centers. These services are designed to work together, enabling Zener to deliver end-to-end projects for telecommunications operators and enterprise clients across installation, construction, and maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Telecomunicaciones

Quantifiable outcome

• 80%+ own resources usage ensuring quality and safety
• +2 more outcomes

Named customers17 records

Segments5 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Seven partnerships are on record, tiered minor.

• Various Universities and Training CentersminorStrategic or Co-development PartnerCollaboration with universities and training centers to integrate young students into Zener branches. In more than 50% of collaborations, students subsequently join ZENER staff. Provides theoretical knowledge integration with practical work experience.
• DKV InsuranceminorOthersBeneficial agreement signed with DKV insurance company, making health services available to all employees.
• SANITAS InsuranceminorOthersBeneficial agreement signed with SANITAS insurance company, making health services available to all employees.
• Doctors Without Borders (Médicos Sin Fronteras)minorOthersZENER donates 1% of annual profits to Doctors Without Borders as part of social contribution commitment.
• CaritasminorOthersZENER donates 1% of annual profits to Caritas as part of social contribution commitment.
• Food BankminorOthersCollaboration with Food Bank in food collection campaigns where ZENER donates one additional kg for every kg donated by employees.
• St. Cristina Nursery School (Dar es-Salam, Tanzania)minorOthersRegular collaboration sending hardware and school materials for children. Part of ZENER's commitment to bring technology closer to underprivileged groups.

Scale indicators9 records

Recent moves11 records

Expansion highlights6 records

Broad incumbents

• Ericsson: Global telecom equipment vendor and Zener technology partner for mobile networks. Comparable in the broader telecom infrastructure ecosystem, driving demand for Zener's installation services through its 5G equipment sales to European operators.
• Quanta Services: US-listed infrastructure services leader in electric power, telecom, and renewable energy construction. Comparable in service breadth (telecom + energy + data center infrastructure) but at significantly larger scale and with broader geographic and vertical exposure.
• Cellnex Telecom: Europe's largest independent telecom tower operator. While a Zener customer rather than direct competitor, it operates in the same telecom infrastructure value chain and is a key demand driver for Zener's tower-related installation and maintenance services.
• MasTec: US-listed infrastructure construction company serving communications, clean energy, pipeline, and power markets. Overlaps with Zener's telecom and renewable energy service lines but operates at much larger scale across multiple verticals.
• Huawei: Global telecom equipment vendor and Zener technology partner/award giver (Best Partner in Spain 2024). Operates upstream of Zener in the value chain but directly influences Zener's 5G and mobile network project pipeline as a major equipment supplier to its operator customers.

Direct peers

• Sirti: Italian-headquartered telecom network infrastructure specialist offering design, deployment, and maintenance for fixed, mobile, and transport networks. Closely comparable to Zener's European field services model, particularly for the Italian market where Zener also operates.
• Dycom Industries: US-listed specialty contractor providing engineering, procurement, construction, and maintenance services for telecom providers including fiber, wireless, and broadband. Closely comparable to Zener's end-to-end telecom infrastructure services model and operator customer base.
• Eltel Group: Nordic-based infrastructure services company focused on power and communication networks, including telecom network build, fiber rollout, and maintenance. Directly comparable in service mix (telecom infrastructure services) and operating model (B2B for operators and utilities).
• Telent Technology Services: UK-headquartered provider of network design, build, and managed services for telecom operators and critical national infrastructure. Comparable to Zener across fixed/mobile network services, managed network operations, and security systems integration.
• Circet: Leading European telecom infrastructure services provider delivering fixed and mobile network build, fiber rollout, and maintenance across multiple countries. Directly comparable to Zener in business model (B2B services for telecom operators), geographic footprint (pan-European), and end-to-end project delivery.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/grupozener
• YouTubeyoutube.com/@zener
• Facebookfacebook.com/Zener
• LinkedInlinkedin.com/company/zener
• Instagraminstagram.com/zener

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries14 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Zener