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Hyosung Group Launches 30-MW Hyperscale AI Data Center in Seoul
On 16 June 2026, Hyosung Group opened the 30‑megawatt STT Seoul 1 data center in Seoul’s Geumcheon District. The facility, operated by Hyosung‑STT GDC—a joint venture between Hyosung Heavy Industries and Singapore‑based ST Telemedia Global Data Centres (STT GDC)—marks the conglomerate’s first major entry into Korea’s fast‑growing data‑center market.
Designed to power cloud and artificial‑intelligence workloads, STT Seoul 1 targets the high‑energy demands of generative‑AI applications. The site’s proximity to business hubs such as Gangnam and Yeouido delivers low‑latency connectivity while sidestepping the grid constraints that have hampered large‑scale power procurement in the city.
Hyosung Heavy Industries supplied the centre’s electrical systems, including ultrahigh‑voltage transformers, switchgear and power‑management solutions. The company said the components were chosen to boost operational reliability and energy efficiency.
The joint venture’s ownership structure gives Singtel and KKR a 60‑percent stake in STT GDC, with Hyosung Heavy Industries holding the remaining 40 percent. The partnership began in 2021 after a 2019 meeting between Hyosung Group Chairman Cho Hyun‑joon and STT GDC Group CEO Bruno Lopez, leading to the joint venture’s creation.
During the opening ceremony, Cho said the facility “reflects the combined strengths of STT GDC’s expertise and Hyosung’s power solutions capabilities, and will serve as a core piece of infrastructure supporting the growth of Korea’s AI industry while setting a new benchmark for future competitiveness.” He added that Hyosung aims to develop the data‑center business into a new growth engine for the group and to help reshape the global AI ecosystem.
STT Seoul 1 earned Tier III Certification of Design Documents from the Uptime Institute, a standard that supports high availability through concurrent maintainability. The company also installed global‑standard security and risk‑management systems to guard against physical and operational threats.
Hyosung plans to use its groupwide capabilities to expand the AI data‑center business. Hyosung Heavy Industries will focus on power solutions and construction, while Hyosung ITX will contribute cloud, content‑delivery‑network and digital‑transformation technologies to improve operations and traffic management.
The launch comes amid South Korea’s data‑center market growth, driven by rising demand for cloud and AI services. Power constraints and grid regulations have made it difficult for new facilities to secure large‑scale capacity, making Hyosung’s power‑infrastructure expertise a key differentiator.
Hyosung’s move into hyperscale AI infrastructure signals the group’s broader strategy to become a key infrastructure provider for Korea’s emerging AI economy. The company’s power‑equipment arm, with a long history of supplying high‑voltage direct‑current systems and other grid‑enhancement solutions, is expected to play a central role in meeting the energy needs of future data‑center expansions.
As STT Seoul 1 begins full commercial operations, it will serve as a testbed for Hyosung’s integrated approach to power, infrastructure and cloud services. The company has indicated plans to replicate the model in other locations, potentially expanding its global footprint in the AI data‑center sector.
The opening of STT Seoul 1 underscores the growing importance of specialized data‑center infrastructure in supporting AI workloads and highlights the strategic partnership between a Korean industrial conglomerate and a Singapore‑based data‑center operator.
Designed to power cloud and artificial‑intelligence workloads, STT Seoul 1 targets the high‑energy demands of generative‑AI applications. The site’s proximity to business hubs such as Gangnam and Yeouido delivers low‑latency connectivity while sidestepping the grid constraints that have hampered large‑scale power procurement in the city.
Hyosung Heavy Industries supplied the centre’s electrical systems, including ultrahigh‑voltage transformers, switchgear and power‑management solutions. The company said the components were chosen to boost operational reliability and energy efficiency.
The joint venture’s ownership structure gives Singtel and KKR a 60‑percent stake in STT GDC, with Hyosung Heavy Industries holding the remaining 40 percent. The partnership began in 2021 after a 2019 meeting between Hyosung Group Chairman Cho Hyun‑joon and STT GDC Group CEO Bruno Lopez, leading to the joint venture’s creation.
During the opening ceremony, Cho said the facility “reflects the combined strengths of STT GDC’s expertise and Hyosung’s power solutions capabilities, and will serve as a core piece of infrastructure supporting the growth of Korea’s AI industry while setting a new benchmark for future competitiveness.” He added that Hyosung aims to develop the data‑center business into a new growth engine for the group and to help reshape the global AI ecosystem.
STT Seoul 1 earned Tier III Certification of Design Documents from the Uptime Institute, a standard that supports high availability through concurrent maintainability. The company also installed global‑standard security and risk‑management systems to guard against physical and operational threats.
Hyosung plans to use its groupwide capabilities to expand the AI data‑center business. Hyosung Heavy Industries will focus on power solutions and construction, while Hyosung ITX will contribute cloud, content‑delivery‑network and digital‑transformation technologies to improve operations and traffic management.
The launch comes amid South Korea’s data‑center market growth, driven by rising demand for cloud and AI services. Power constraints and grid regulations have made it difficult for new facilities to secure large‑scale capacity, making Hyosung’s power‑infrastructure expertise a key differentiator.
Hyosung’s move into hyperscale AI infrastructure signals the group’s broader strategy to become a key infrastructure provider for Korea’s emerging AI economy. The company’s power‑equipment arm, with a long history of supplying high‑voltage direct‑current systems and other grid‑enhancement solutions, is expected to play a central role in meeting the energy needs of future data‑center expansions.
As STT Seoul 1 begins full commercial operations, it will serve as a testbed for Hyosung’s integrated approach to power, infrastructure and cloud services. The company has indicated plans to replicate the model in other locations, potentially expanding its global footprint in the AI data‑center sector.
The opening of STT Seoul 1 underscores the growing importance of specialized data‑center infrastructure in supporting AI workloads and highlights the strategic partnership between a Korean industrial conglomerate and a Singapore‑based data‑center operator.
