Atos Group: Zagreb Data Center II

Zagreb Data Center II is the second flagship facility of the Atos Group in Croatia’s capital city, designed to expand the group’s data center capabilities in the Adriatic and Central European region. Built as an ultra-modern extension of the original Zagreb facility, it is optimized for high-density compute, AI workloads, and cloud-native deployments. Zagreb DC II enhances Atos' regional footprint by delivering next-gen digital infrastructure, advanced security features, and environmentally sustainable design.

Strategic Role

• Purpose: Supports overflow demand, high-performance computing (HPC), and specialized colocation for cloud and AI-native applications
• Complementary Facility: Built to interconnect seamlessly with the original Zagreb Data Center I, enabling geo-redundancy and distributed workload management
• Target Clients: Multinational corporations, fintech startups, government agencies, and academic institutions

Facility & Architecture

• Tier Classification: Meets stringent Tier III+ standards with fault-tolerant capabilities
• Structure: Three-level reinforced concrete and steel building with optimized airflow and vibration isolation for sensitive hardware
• White Space: Over 7,000 square meters of IT space, configured with modular containment zones for different workload classes
• Power Density: Up to 20 kW per rack, enabling dense server clusters and GPU-accelerated systems

Power & Cooling

• Power Infrastructure:
• Redundant utility feeds (2N) with backup diesel generators and 72-hour fuel autonomy
• Smart metering and automated load balancing for energy efficiency
• Cooling Design:
• Liquid cooling ready (direct-to-chip and rear-door heat exchangers)
• Hot aisle/cold aisle containment with environmental sensors
• PUE Target: Designed to operate at PUE < 1.3 year-round

Connectivity & Network Performance

• Carrier-Dense Facility: Multiple Tier 1 and Tier 2 providers with direct fiber routes to Vienna, Budapest, and Ljubljana
• Dark Fiber: Direct interconnection to Zagreb I, enabling seamless replication and latency optimization
• Cloud Access:
• Private links to AWS, Azure, and Google Cloud via Atos’ secure multicloud fabric
• Kubernetes-ready platforms for container orchestration

Security, Compliance & Monitoring

• Physical Security:
• Tiered zones with mantraps, facial recognition, and secure cages
• Armed on-site security and 24/7 monitoring
• Cybersecurity:
• Native integration with Atos' MDR (Managed Detection & Response) and CyberSOC services
• Continuous vulnerability scanning, behavioral analytics, and log correlation
• Certifications:
• ISO 27001, ISO 22301, EN 50600, PCI-DSS, and GDPR-aligned
• Custom compliance packages available for finance and healthcare clients

Core Services

• High-Density Colocation
• AI/ML Infrastructure Hosting
• Edge-ready Racks & Suites
• Bare Metal as a Service (BMaaS)
• Sovereign Cloud Environments
• Zero Trust Access & Monitoring

Green Innovation & Sustainability

• Energy Procurement: 100% from renewable Croatian sources (hydro and wind)
• Design Efficiency: Green roof system, reflective insulation, and recycled materials in construction
• Lifecycle Management: Efficient asset refresh and certified e-waste handling
• Metrics:
• Real-time CO₂ offset tracking for tenants
• Quarterly sustainability reports for ESG compliance

Conclusion

Zagreb Data Center II is a future-forward, enterprise-class data center that builds on the success of its predecessor. Designed to support the rising demand for intensive workloads, AI infrastructure, and sovereign hybrid cloud, it positions Atos as a technology leader in one of Europe’s most strategically connected regions. With unmatched sustainability, security, and performance, Zagreb DC II is an ideal home for next-gen digital infrastructure.