Early career

In the beginning of her career, Kang worked for the Korean Broadcasting System^[7] - just like her father - as a producer of English Service Division of Radio Korea. As an associate professor, she lectured at Cleveland State University, Ohio and Sejong University, Seoul. Between and after her career in universities, she assisted several Speakers of the National Assembly of South Korea^[7] on global issues in the fields of human rights, women's advancement and parliamentary diplomacy as Secretary for International Relations and an interpreter.

She was also active in women's organizations in Korea, serving as the spokeswoman of the Korean Women's NGO Committee for the Beijing Conference in 1995, a member of the International Relations Committee of the Korean National Council of Women, and a director of Korean Institute for Women and Politics.

In the 1990s Kang was the English voice of Seoul subway system.

Ministry of Foreign Affairs and Trade

In 1998 Kang joined the Korean Foreign Service, without ever having passed the Foreign Service Exam, as the acting Senior Research Officer of Foreign Ministry's Institute of Foreign Affairs and National Security.^[5] In 1999 she was specially employed as Senior Advisor and Principal Speechwriter to the Foreign Minister and Principal Interpreter to the President. While working as the president's interpreter for three years, she gained then-President Kim's confidence due to her interpretation during his phone call with U.S. president Clinton.

From September 2001 to July 2005, Kang was Minister-Counselor and later Minister at Permanent Mission of the Republic of Korea to the United Nations.^[5] During that time, she chaired the Commission on the Status of Women for its 48th and 49th session.^[8] Before and after working at the Permanent Mission, she worked as Deputy Director-General and Director General for the International Organisations of the Foreign Ministry. Later, she was appointed as Ambassador-at-Large for Global Affairs of the Ministry.

United Nations

Kang held key roles in the United Nations under three consecutive Secretaries-General, from Kofi Annan and Ban Ki-moon to the current officeholder, Antonio Guterres. In September 2006, Kofi Annan appointed her as Deputy High Commissioner for Human Rights, equivalent to Assistant Secretary-General, after seeing her potential when she chaired the UN commission on women.^[8] She was appointed by Ban Ki-moon as Deputy Emergency Relief Coordinator and Assistant Secretary-General for the Office for the Coordination of Humanitarian Affairs in March 2013.^[5] In October 2016, she was appointed by then-Secretary-General-elect, António Guterres as Chief of the Secretary-General-designate's Transition Team. Later in February 2017, she continued to work with Secretary-General Guterres as his Senior Advisor on Policy, equivalent to Under-Secretary-General, before resigning for the foreign minister of South Korea.^[9]

Cabinet

After an announcement of her nomination by the Blue House in May 2017, Kang faced hard opposition from the opposition parties before and during her nomination hearing at the National Assembly due to allegations, such as address fraud^[10] and the nationality of her oldest daughter. Opposition was partly composed of claims that she lacks experience dealing directly with global powers - the U.S. in particular. During her hearing, she asked for understanding given that she was unable to manage her children in detail as a working parent, did not share finances with her husband to support her parents as their oldest child, and lived abroad for a long time. With public statements of support from a trade union of the Ministry,^[11] Japanese military sex slaves, or widely known as "comfort women",^[12] Korea NGO Council for Overseas Development Cooperation, and her eleven predecessors,^[13] respectively, along with the public support of 60% and more, President Moon appointed her as his first foreign minister, a post that requires a nomination hearing but not the expressed approval from the legislature, in June 2017.^[14] With her and other female cabinet members, President Moon was able to keep his election promise to fill over 30% of his cabinet with women.^[15]

During her talks with Hansung University students, she revealed that she had never met President Moon in person before her conferment ceremony at the Blue House.^[16]

She is the third head of the ministry to attend the high-level segment of the regular sessions of the Human Rights Council after her predecessors Ban Ki-moon and Yun Byung-se. As of 2019 she is the first Korean foreign minister to make keynote speech at every regular session of the Council during their tenure.

Because of the COVID-19 pandemic, Israel has imposed an entry ban on South Koreans and foreign tourists who stayed in South Korea in the past 14 days.^[17][18][19] Kang has described Israel's response as "excessive".^[20]

As of December 2020, Kang is the only cabinet minister - and one of four at a ministerial level along with Hong Nam-ki, Suh Hoon and Kim Sang-jo - to continue to serve President Moon from the beginning of his presidency in 2017.^[21][22] On January 20, 2021, President Moon nominated his first director of National Security Office, Chung Eui-yong, to replace Kang.^[23][24]

Post-cabinet

In February 2021, Kang became the last member of President Moon's first cabinet formed in 2017 to be replaced after more than three and a half years.^[25] A month later, she joined Park Young-sun's campaign in Seoul mayoral by-election as its chair of international cooperation committee.^[26]

In August 2021, Kang was appointed a distinguished professor emeritus at the Graduate School of International Studies at Ewha Womans University,^[27] the first university she visited as the country's foreign minister in 2018.^[28]

In October 2021, Kang announced her candidacy for the next Secretary General of the International Labour Organization.^[29][30] In the final vote, she came in only fourth; the position eventually went to Houngbo.^[31]