ST Telemedia Global Data Centers (STT GDC), a global data center provider, announced Tuesday the opening of STT Seoul 1, its first data center in South Korea.

Developed and operated through a joint venture between STT GDC (60 percent) and Hyosung Heavy Industries (40 percent), the facility establishes a strategic foothold for STT GDC in one of Asia’s most advanced digital markets, extending STT GDC’s platform to support customers deploying artificial intelligence (AI) and cloud infrastructure across Northeast Asia, it said in a statement.

According to the statement, South Korea is a strategically important market for high-performance digital infrastructure, underpinned by strong enterprise digitalization and growing demand for compute capacity.

The opening of STT Seoul 1 reflects STT GDC’s broader approach to expanding in markets where long-term digital demand, infrastructure readiness and customer requirements are converging.

The facility is designed to support a range of hyperscale and enterprise deployments, including evolving high-density workloads.

“AI infrastructure demand is increasingly concentrating in markets where digital capability, power availability and customer requirements come together,

“STT Seoul 1 establishes an important foundation for STT GDC’s presence in Korea, extending a globally consistent platform into a key Northeast Asian market, where customers are scaling increasingly advanced workloads and require infrastructure that is resilient, efficient and built for long-term growth,” said Charles Chulhoy Huh, Country Head, ST Telemedia Global Data Centers (Korea).

Hyosung Group Chairman Hyun-Joon Cho said that over a decade ago, they recognized the value of big data—often referred to as the ‘oil of the 21st century’— and set out with a firm conviction to build core AI infrastructure in the Seoul metropolitan area, the ‘brain’ of Korea.

“Today, STT Seoul 1 stands as a timely oasis for advanced IT companies that have long faced infrastructure constraints, and a new milestone marking the future of Korea’s AI ecosystem,

“Going forward, we will continue to expand our collaboration with STT GDC, not only in Korea but also in shaping the next paradigm of the global AI ecosystem,” he added.

Located in Gasan-dong, Geumcheon-gu, Seoul, STT Seoul 1 comprises approximately 40,000 square meters of gross floor area and supports up to 30MW of information technology (IT) load, with full commercial operations beginning in June 2026.

“Given that Korea is aiming to become one of the top 3 global leaders in AI, establishing high-quality, efficient data center infrastructure is a critical national priority,

“I look forward to STT Seoul 1 supporting Korea’s journey to becoming a true AI powerhouse by creating a more efficient, professional, and sustainable data center model,” said Jeehye Park, Member of the National Assembly of Korea.

Singapore’s Ambassador to the Republic of Korea Wong Kai Jiun also said Singapore and South Korea share strong and longstanding ties in trade, technology and innovation.

“As both countries continue to advance their digital and AI capabilities, trusted digital infrastructure will play an important role in enabling deeper connectivity and collaboration,

“STT Seoul 1 demonstrates how cross-border collaboration can support the development of resilient digital infrastructure, strengthen regional connectivity and create new foundations for innovation and growth,” he added.

Ahead of its launch, STT Seoul 1 has achieved the Tier III Certification of Design Documents (TCDD) from Uptime Institute, validating a design approach that supports high availability through concurrent maintainability.

The certification provides early proof of the engineering and design discipline that underpins the facility.

STT Seoul 1 has been built with a strong focus on uninterrupted operations and energy efficiency from the design stage.

The facility features dual 22.9kV power feeds with a redundant configuration, together with a distributed redundant (DR) UPS system and backup generators capable of operating for up to 24 hours without refueling, enhancing operational resilience in emergency situations.

Its cooling system supports a design PUE of below 1.3 and is complemented by thermal energy storage (TES) to enable stable and continuous cooling.

STT Seoul 1 also incorporates a seven-layer physical security framework, including intelligent video analytics and biometric authentication, and has achieved LEED Gold certification, reflecting a focus on efficient, high-performance infrastructure.

These features position STT Seoul 1 to support customers requiring resilient, efficient infrastructure for mission-critical cloud and AI deployments, while reinforcing STT GDC’s ability to bring consistent engineering and operating standards into new markets.

Established in 2021, the joint venture between Hyosung Heavy Industries and STT GDC combines STT GDC’s global data center platform and operating expertise with Hyosung’s local market capabilities, supporting the development of infrastructure aligned with both international standards and local requirements.

STT GDC operates a global portfolio of data centers across key markets, including Singapore, the United Kingdom, Germany, India, Italy, Thailand, Indonesia, Japan, the Philippines, Malaysia, Vietnam, and Korea.

With the opening of STT Seoul 1, the firm aims to support the continued development of Korea’s digital economy as part of STT GDC’s broader platform.

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