[3][4][5] During the presidency of Lee Myung-bak, he was a senior secretary of the Inter-American Development Bank.
[3][4][5] Following the inauguration of the President Moon Jae-in, Koo became the Chief of Budget Office within the Ministry of Economy and Finance.
[6] Prior to the 2020 election, Koo was one of the potential candidate in Daegu-North Gyeongsang area.
"[7] On 8 May 2020, Koo was appointed the new Minister for Government Policy Coordination.
[8][9][10] Koo is a graduate of Youngshin High School and read economics at Seoul National University.