JMnet became the only media group that runs such a diverse portfolio in Korea. With over 2,500 employees, its vision is to become a global media group that represents an Asian voice and an Asian perspective. JMnet acquired Multiplex MegaBox in 2015 and acquired Bokwang Corporation in the following year. Bokwang Corporation was changed to Phoenix Hotel and Resorts since it had been acquired. JMnet declared JoongAng Group for new beginnings in 2018. During his career, he has been active in public service. He worked as an economist for the World Bank from 1977 to 1983. From 1983 to 1985, he served as principal assistant to the chief of staff to the president of Korea. He also worked as a researcher in Korea Development Institute from 1985 to 1986. He was appointed to the ambassador to the United States from February 2005 until his resignation in September 2005. As being recognized by a wide range of global network and partnership, he served as president of the World Association of Newspapers, a position to which he was elected in 2002 and re-elected in June 2004. He also served as the first chairman of the newly launched the English-Speaking Union Korea in 2004. He is a member of the Trilateral Commission; the International Advisory Council for the Center on Northeast Asian Policy Studies at the Brookings Institution; the Advisory Council for the Asian Studies Center of the Heritage Foundation; and the Advisory Council of the Korea Society. He also serves on the board of the Asia Society. Hong has contributed to strengthen ties between scholars and journalists as annually hosting J-Global Forum and Northeast Asia Trilateral Forum. He is the president of the organizing committee of the World Culture Open(WCO), a glocal cultural network of people creatively collaborating for cultural exchange, space and support worldwide. As an effort to restore traditional culture in South Korea, he founded Hwa Dong Cultural Foundation and has been staging related events and activities around the world. In 2011, Hwa Dong Cultural Foundation and The Prince's Charities Foundation in UK completed the project of filming “The Arch of Enlightenment,” a documentary of restoration of Gwanghwamun Gate. The film was premiered at London's Curzon Mayfair Cinema on 31 January 2011 with about 300 guests including Prince Charles, and later aired on Sky Art 2. As the founder of Yumin Cultural Foundation, he also has supported various efforts to promote creative works in the fields of journalism, science, culture and society. Hong Seok-hyun's father is Hong Jin-ki, a former minister of justice, chief executive officer of Joongang Broadcasting Station and president of Joongang Ilbo; as well as an identified Chinilpa.