DC Cluster, Security Manager

DayOne; Lahti; On-site; EUR 90,000 - 130,000; Full time

Job summary

DayOne is building its flagship hyperscale data center campus in Lahti. We seek a Security Manager to oversee security operations, develop policies, manage personnel and vendors, and coordinate incident responses to safeguard facilities, assets, and people.

Key duties include audits, risk assessments, access control, CCTV, compliance, and budgeting. English fluency is required; Finnish is a plus. Join a growing, international team shaping global data infrastructure.

Qualifications

• Degree in Engineering or Information Technology or related field.
• Experience in security management, preferably in high-security environments.
• Knowledge of security protocols, systems and best practices.
• Proficiency with security management software and tools.
• Certifications such as CISSP or PSP are advantageous.

Responsibilities

• Developing and implementing security policies and procedures.
• Overseeing day-to-day security operations across the campus.
• Coordinating security personnel, training, and compliance.
• Managing access control, CCTV and alarm systems.
• Ensuring authorized access while preventing unauthorized entry.
• Conducting security audits and risk assessments.
• Leading incident response and breach handling.
• Liaising with external security providers and contractors.
• Developing security awareness programs and training.
• Ensuring compliance with legal and regulatory requirements.
• Preparing security reports for senior management.
• Managing security budgets and evaluating new technologies.

Skills

Security management

Security protocols

Security software

Education

Degree in Engineering

Degree in IT

Tools

Security management software

Job description

Join DayOne – Shaping the Future of Data Infrastructure

DayOne is a global leader in the development and operation of high-performance data centers. As one of the fastest-growing companies in the industry, we’ve built a robust presence across Asia and Europe — and we’re just getting started. As we expand into new international markets, we’re looking for talented, driven individuals to join us on this exciting journey. This is more than a job — it’s an opportunity to be a key contributor to our dynamic team and help shape the future of global data infrastructure. If you're passionate about innovation, technology, and growth, we invite you to be part of DayOne’s next chapter.

About the Role

DayOne is building its flagship hyperscale data center campus in Lahti, on a former industrial site in Kiveriö. The campus is designed to use Finland's naturally cool climate for free cooling, with air-cooled chillers that remove the need for freshwater cooling. Join the Lahti team early and help shape how a campus of this scale is built, commissioned, and run. As a Security Manager, you will be responsible for overseeing and managing security operations across the data center campus. You will develop and implement security policies, manage security personnel and vendors, ensure compliance with security standards, and coordinate responses to security incidents to safeguard facilities, assets, and personnel.

Key Responsibilities

Security Operations Management

Developing and implementing security policies and procedures.

Overseeing day-to-day security operations across the campus.

Coordinating and managing security personnel, training activities, and compliance with security protocols.

Managing access control systems, CCTV systems, and alarms.

Ensuring authorized access while preventing unauthorized entry.

Risk Management and Incident Response

Conducting security audits and risk assessments to identify vulnerabilities.

Developing and maintaining incident response plans.

Leading responses to security incidents and breaches.

Vendor and Contractor Management

Liaising with external security providers and contractors.

Supporting contract management and vendor relationships.

Ensuring consistent and high-quality security service delivery.

Security Training and Awareness

Developing and delivering security awareness programs.

Promoting a culture of security awareness and vigilance across the campus.

Compliance and Reporting

Ensuring compliance with relevant legal and regulatory requirements.

Preparing regular security reports for senior management.

Maintaining records of security incidents and corrective actions.

Budget and Technology Management

Managing security-related budgets and expenditures.

Evaluating emerging security technologies and industry developments.

Recommending and implementing improvements to security systems and controls.

Requirements

Technical skills

Degree in Engineering, Information Technology, or a related field.

Experience in security management, preferably within a data center or other high-security environment.

Strong knowledge of security protocols, systems, and best practices.

Proficiency with security management software and tools.

Professional certifications such as CISSP, PSP, or equivalent are considered beneficial.

Soft skills

Ability to work in a fast-paced operational environment.

Proactive, solutions-oriented mindset with high integrity and a collaborative working style.

Proficiency in English, both written and spoken.

Knowledge of Finnish is considered a benefit.

Why Join DayOne?

Be a part of a company scaling fast in a booming industry.

Work on an international stage with global leaders.

Shape your career in a culture that values curiosity, agility, and bold thinking.

DayOne is proud to be an equal opportunity employer.

We celebrate diversity and are committed to creating an inclusive environment for all employees.

DayOne is a data center pioneer that develops and operates next-gen digital infrastructure for industry leaders who demand reliable, cost-effective and quickly scalable solutions.

Our cutting-edge facilities empower hyperscalers and large enterprises to achieve rapid deployment and enhance connectivity, driving transformative engagement and innovation as we shape the future of industries.

DayOne's data centers are located across key markets, including Singapore, Johor (Malaysia), Batam (Indonesia), Greater Bangkok, Hong Kong SAR, Tokyo, and beyond.

Headquartered in Singapore, DayOne’s leadership team draws on over two decades of industry experience and a track record of building Asia's largest data center business.

With DayOne, we have created the SIJORI (Singapore, Johor, and Riau Islands) market as a global data center hub.

As demand for strategically located and customized data centers rises, DayOne's entrepreneurial spirit, customer-first strategy, deep local partnerships, and agile executional capabilities uniquely position us to power the growth ambitions of leading hyperscalers and large enterprises around the world.