ST Telemedia Global Data Centres has brought its first South Korean data center online, opening a 30-megawatt facility in Seoul's Gasan-dong district through a joint venture with local industrial conglomerate Hyosung Heavy Industries. The facility, designated STT Seoul 1, comprises approximately 40,000 square meters of gross floor area and entered full commercial operations in June 2026.
Located in Geumcheon-gu, the data center was developed under a partnership structure that gives STT GDC a 60 percent stake and Hyosung Heavy Industries the remaining 40 percent. The project was first announced in 2021, with plans for a second Seoul facility following in 2022.
The facility features dual 22.9-kilovolt power feeds configured for redundancy and has received Tier III certification from Uptime Institute. STT GDC has positioned the infrastructure to serve both hyperscale and enterprise customers deploying high-density workloads, including artificial intelligence applications.
Charles Chulhoy Huh, country head for ST Telemedia Global Data Centres in Korea, framed the launch in terms of converging market fundamentals. "AI infrastructure demand is increasingly concentrating in markets where digital capability, power availability, and customer requirements come together," he said. "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."
Hyosung Heavy Industries Corporation, founded in 1962, operates as a subsidiary of Hyosung Group and specializes in power transmission and distribution solutions, transformers, construction, and renewable energy. The company's involvement brings local infrastructure expertise to the joint venture.
Hyosung Group chairman Hyun-Joon Cho positioned the facility as a long-anticipated infrastructure play. "Over a decade ago, we 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," he said.
Cho characterized the facility's significance in the context of regional supply constraints. "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," he said. "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."
The launch extends STT GDC's regional footprint in the Asia-Pacific market and positions the operator to compete for hyperscale customer deployments in Northeast Asia. The facility's capacity and certification level align with specifications typically required by cloud service providers and enterprise customers running compute-intensive workloads.