Han Duck-soo: A Career of Diplomacy, Governance, and Legal Turmoil
Han Duck-soo is a prominent South Korean diplomat, economist, and politician whose career has spanned several decades of the nation's modern history. Having served as the Prime Minister of South Korea across two different administrations and stepping into the role of Acting President during periods of extreme political instability, Han has been a central figure in the country's executive branch.
His trajectory is marked by a transition from a highly respected academic and diplomat to a political figure embroiled in the legal aftermath of the 2024 martial law crisis. From the halls of Harvard University to the Seoul Detention Center, Han's life reflects the volatile intersection of law, power, and governance in South Korea.
Key Facts
- Roles: Served as Prime Minister twice (2007–2008 and 2022–2025) and Acting President twice (2024 and 2025).
- Education: Holds a BA from Seoul National University and an MA and PhD from Harvard University.
- Diplomatic Experience: Served as the South Korean Ambassador to the United States from 2009 to 2012.
- Legal Status: Convicted on three counts related to the 2024 martial law movement, resulting in a 15-year prison sentence.
- Political Affiliation: Joined the People Power Party in 2025 after previously serving as an Independent.
Academic Foundation and Early Career
Before entering the highest levels of government, Han Duck-soo established himself as an expert in economics. He pursued his higher education at Seoul National University before moving to the United States, where he earned both his Master's and Doctoral degrees from Harvard University. His doctoral thesis, titled "External shocks, adjustments, and growth: Korean case" (1984), was completed under the guidance of advisors Hollis B. Chenery and Dwight H. Perkins.
His early professional life included service in the Republic of Korea Army, where he attained the rank of Sergeant. This combination of academic rigor and public service paved the way for his ascent through the diplomatic and economic corridors of the South Korean government.
The Premierships: 2007–2008 and 2022–2025
Han Duck-soo is one of the few individuals to serve as the 38th and 48th Prime Minister of South Korea, serving under two different presidents.
First Term (2007–2008)
Han first served as Prime Minister from April 2, 2007, to February 29, 2008, under President Roh Moo-hyun. Prior to this full term, he served as acting Prime Minister from March 16 to April 19, 2006.
Interim Diplomatic and Economic Roles
Following his first premiership, Han continued to serve the state in high-capacity roles. He served as the Deputy Prime Minister and Minister of Economy and Finance from 2005 to 2006 and later as the South Korean Ambassador to the United States from March 9, 2009, to February 17, 2012, under President Lee Myung-bak.
Second Term (2022–2025)
Han returned to the premiership on May 21, 2022, under President Yoon Suk Yeol. His second tenure was marked by significant domestic challenges, including protests by trainee doctors against healthcare reforms. This term ended in a series of political upheavals that led to his transition into the acting presidency.
Acting Presidencies and Political Crisis
Han Duck-soo stepped into the role of Acting President of South Korea on two separate occasions during the turmoil surrounding President Yoon Suk Yeol.
The 2024 Transition
Han first served as Acting President from December 14 to December 27, 2024. This period followed the impeachment of President Yoon. However, Han's own tenure was short-lived as he faced impeachment motions from the opposition party, leading to his removal from the acting presidency on December 27, 2024, with Choi Sang-mok taking over as acting Prime Minister.
The 2025 Reinstatement
After the Constitutional Court of Korea dismissed his impeachment on March 24, 2025, Han resumed the role of Acting President from March 24 to May 1, 2025. During this second term, he dealt with national emergencies, including severe wildfires, and engaged in diplomatic talks with U.S. President Donald Trump. He also faced controversy regarding his nominations of Constitutional Court justices, which were later blocked by a court injunction.
Presidential Bid and Legal Downfall
Following his second acting presidency, Han declared a bid for the presidency on May 2, 2025, pledging constitutional reform. He sought the nomination of the People Power Party (PPP), but after a period of internal party conflict and a failed motion to replace the existing candidate, Kim Moon-soo, Han dropped his bid on May 10, 2025.
Criminal Convictions
The final chapter of Han's public career was defined by the legal fallout of the 2024 martial law declaration. Han was indicted on several severe charges, including:
- Aiding an insurrection
- Perjury
- Falsification and destruction of official documents
On January 21, 2026, Han Duck-soo was apprehended and subsequently sentenced to 15 years of imprisonment. He is currently incarcerated at the Seoul Detention Center.
Summary of Career and Legal Status
| Period | Role | Key Context |
|---|---|---|
| 2007–2008 | Prime Minister | Served under President Roh Moo-hyun |
| 2009–2012 | Ambassador to the U.S. | Served under President Lee Myung-bak |
| 2022–2025 | Prime Minister | Served under President Yoon Suk Yeol |
| 2024, 2025 | Acting President | Two separate terms during political crises |
| 2026–Present | Prisoner | 15-year sentence for insurrection and perjury |
Frequently Asked Questions
How many times did Han Duck-soo serve as Prime Minister?
Han Duck-soo served as Prime Minister twice: first from 2007 to 2008 and again from 2022 to 2025.
Why was Han Duck-soo imprisoned in 2026?
He was convicted on three counts related to the 2024 martial law movement, specifically for aiding an insurrection, perjury, and the falsification and destruction of official documents.
What was Han Duck-soo's academic background?
He is an economist who earned a BA from Seoul National University and both an MA and a PhD from Harvard University.
Did Han Duck-soo ever run for President?
Yes, he declared a presidential bid in May 2025 and sought the nomination of the People Power Party, but he eventually dropped his candidacy on May 10, 2025.
What happened during his second term as Acting President?
During his second term (March–May 2025), he managed national wildfire crises, held phone talks with U.S. President Donald Trump, and faced legal challenges over his appointment of Constitutional Court justices.