Samchully Co., Ltd. engages primarily in city gas distribution and integrated energy solutions in South Korea. Founded in 1955 and headquartered in Seoul, the company supplies natural gas through its retail city gas business; operates compressed natural gas (CNG) stations for vehicles; provides energy audits and environmental consulting; generates and supplies electricity to the Korea Power Exchange; delivers cogeneration systems, heat pumps, gas absorption chillers, and steam/hot-cold water/air conditioning products; develops new and renewable energy solutions including fuel cells, biogas production, waste-to-energy power generation, photovoltaics, geothermal heat, and distributed power generation; undertakes energy performance contracting (ESCO), engineering procurement construction (EPC), and operations & maintenance (O&M) services; conducts piping and cooling/heating works; wholesales plumbing and cooling/heating equipment; manages waste disposal; pursues investments and consulting; and operates car dealerships (including BMW), food services, and hotel businesses. Samchully also explores oil and gas projects in the United States, Iraq, and Uzbekistan via subsidiaries such as S-Power (power generation), HUCES (integrated energy supply), Samchully ES (ESCO and energy plants), Samchully ENG (pipeline engineering and food services), Samchully Motors, and Samchully Asset Management (energy infrastructure). In April 2025, the company signed a memorandum of understanding (MOU) with Doosan Fuel Cell to expand solid oxide fuel cell (SOFC) applications leveraging its power plant expertise; in 2024, it acquired the remaining 49% stake in Human Community Energy System from Korea District Heating Corp. for KRW 28.9 billion to strengthen integrated energy capabilities. Operations span South Korea's Gyeonggi and Incheon regions, with international energy ventures in the United States and select overseas markets.