SK ecoplant (Korean: SK에코플랜트) is an environmental and energy company affiliated with the SK Group, established in 1962 in South Korea.

The SK Ecoplant was founded in 1962 as Hyupwoo Industry (협우산업).

It was later acquired by Seonkyung Group in 1977 and its name changed to Seonkyung Construction (선경종합건설), and then to SK Construction (SK건설) in 1984.

[1] Since then, the company has acquired several environmental management companies, including waste incineration and landfill, and in February 2022, it acquired TES, a Singapore-based electrical and electronic waste management company.

[1][2] In November 2021, It acquired Samkang M&T (삼강엔앰티), a shipbuilding and equipment company that had been manufacturing offshore wind power plants since the early 2010s, and incorporated it as a subsidiary, and in January 2023, the company changed its name to SK Oceanplant.