Data Center Technician

Onnec; Helsinki; Hybrid; EUR 40,000 - 52,000; Full time

Job summary

ONNEC Group is seeking a Data Centre Technician to join our team in Helsinki. You will work under the guidance of a Site Manager and Project Manager to deliver high-quality data centre support activities and ensure compliance with standards.

Responsibilities include installing cabling, fibre terminations, Wi‑Fi systems, CCTV, and IP network upgrades, while managing moves, adds and changes within the data centre environment. Fluency in English and Finnish is required.

Qualifications

• Experience working in a data centre environment.
• Knowledge of structured cabling systems.
• Fluency in both English and Finnish (written and spoken).
• Attention to detail and accuracy; ability to perform under pressure.

Responsibilities

• Install structured cabling systems (fibre and copper).
• Perform fibre optic installation and termination.
• Install Wi-Fi systems.
• Conduct network cabling audits.
• Build data centre cages and pathways.
• Work with hot aisle/cold aisle containment (HACS/CACS).
• Install IP CCTV systems.
• Carry out patching and upgrades.
• Manage adds, moves, and changes within the data centre environment.

Skills

Experience in a data centre

Structured cabling knowledge

Bilingual English & Finnish

Attention to detail

Under pressure performance

Team-oriented mindset

Job description

ONNEC Group
ONNEC Group is a leading independent technology partner and global systems integrator, with more than 30 years of experience and a team of 800+ specialists worldwide. We provide end-to-end connectivity solutions that help organisations everywhere stay connected and future-ready.

From structured cabling to managed services, we deliver reliable infrastructure designed, built, deployed, and optimised to meet the highest standards. Our comprehensive services give businesses the connectivity they can depend on.

As a fast-growing organisation, attracting and retaining top talent is essential to our success. We work hard to provide a challenging, supportive, and rewarding workplace for all our employees. ONNEC is proud to have achieved the Investors in Diversity Foundational Award, recognising our commitment to equality, diversity, and inclusion.

Our vision is clear: to be the global partner of choice for the design, delivery, and management of connected IT infrastructure for the world's leading technology and financial services companies.

ONNEC Nordic
As trusted partners to hyperscale and data centre operators, we leverage the unique land and climate advantages of the Nordic region. With a team of more than 80 specialists across Denmark, Sweden, Norway, and Finland, ONNEC is well-positioned to support continued growth and innovation.

As a Data Centre Technician, you will be part of a dedicated team, working under the guidance of a Site Manager and Project Manager. You will contribute to delivering high-quality support activities within data centre halls, ensuring all work is carried out in line with agreed standards.

Key responsibilities:

• Install structured cabling systems (fibre and copper)
• Perform fibre optic installation and termination
• Install Wi-Fi systems
• Conduct network cabling audits
• Build data centre cages and pathways
• Work with hot aisle/cold aisle containment (HACS/CACS)
• Install IP CCTV systems
• Carry out patching and upgrades
• Manage adds, moves, and changes within the data centre environment

Qualifications and skills:

• Experience working in a data centre environment
• Knowledge of structured cabling systems
• Fluency in both English and Finnish (written and spoken)
• Attention to detail and accuracy
• Ability to perform under pressure
• Team-oriented mindset