Services
Additional positions
Jan. 2023 - Dec. 2024: Academic Director (학술이사), Korean Society for Industrial and Applied Mathematics, Seoul, Korea
Jan. 2019 - Dec. 2024: Organizer (사업이사), Kangwon-Kyungki Mathematical Society, Chuncheon, Korea
Mar. 2012 - Dec. 2023: Member, Committee of Discrete Mathematics, The Korean Mathematical Society, Seoul, Korea
Oct. 2020 - Aug. 2021: Special Researcher (특별연구원), Research Institute for Basic Sciences, Jeju National University, Jeju, Korea.
Host: Yong Sik Yun
Sep. 2020 - Aug. 2021: Visiting Research Fellow (초빙연구위원), Discrete Mathematics Group (DIMAG), Institute for Basic Science (IBS), Daejeon, Korea.
Host: Sang-il Oum
Jan. 2019 - Dec. 2020: Organizer of Korean Mathematical Olympiad (올림피아드 담당 사업이사), The Korean Mathematical Society, Seoul, Korea
Jan. 2015 - Dec. 2016: Organizer of Information System (전산 담당 사업이사), The Korean Mathematical Society, Seoul, Korea
May 2015 - July 2015: Visiting Scholar, Center for Applications of Mathematical Principles, NIMS, Korea.
May 2013 - Dec. 2014: Member, International Exchanges, Organizing Committee (ICM-OC), ICM 2014, COEX, Seoul, Korea
May 2014 - June 2014: Research Visitor, Department of Mathematics, Pennsylvania State University, USA.
Host: Ae Ja Yee
Professional activities
Jan. 2023: Organizer, Gyeonggi-Incheon Combinatorics Workshop (GICW 2022/23), Inha University, Incheon, Korea.
Dec. 2021: Organizer, 2021 Combinatorics Workshop (CW2021), The Bloomvista, Yangpyeong, Korea.
Sep. 2021 - Aug. 2023: Associate Editor, The Korean Journal of Mathematics, Korea
July 2021: Organizer, KAIST Combinatorics Lab. Workshop 2021.07 (KCL2021.07), Zoom, Korea.
Dec. 2020: Organizer, KAIST Combinatorics Lab. Workshop 2020.12 (KCL2020.12), Zoom, Korea.
Aug. 2020: Organizer, 2020 Combinatorics Workshop (CW2020), Kyung Hee University, Seoul, Korea.
May. 2020: Organizer, KAIST Combinatorics Lab. Workshop 2020.05 (KCL2020.05), Zoom, Korea.
Aug. 2019: Organizer, 2019 Combinatorics Workshop (CW2019), Hotel Skypark, Songdo, Incheon, Korea.
July 2019: Deputy Leader (as Observer B), 60th International Mathematical Olympiad (IMO2019), Bath, United Kingdom.
Feb. 2019: Leader, 11th Romanian Master in Mathematics (RMM2019), Bucharest, Romania.
Nov. 2018: Organizer, KAIST Combinatorics Lab. Workshop 2018.11 (KCL2018.11), Inha University, Incheon, Korea.
Mar. 2018: Organizer, Optimization and Learning Tutorial 2018 (OLT2018), Ajou University, Suwon, Korea.
Aug. 2017: Organizer, 2017 Combinatorics Workshop (CW2017), Sungkyunkwan University, Suwon, Korea.
Feb. 2017: Organizer, SageMath Developers Meeting 2017 (SDM2017), Sungkyunkwan University, Suwon, Korea.
Dec. 2016: Organizer, Setup of JupyterHub and its application, Korea University, Korea.
Apr. 2016: Member, Organizing Committee, 2016 KMS spring meeting, Sungkyunkwan University, Suwon, Korea.
Feb. 2016: Organizer, SageMath One-day School 2016, Inha University, Incheon, Korea.
Oct. 2015: Member, Organizing Committee, 2015 KMS annual meeting, Yonsei University, Seoul, Korea.
July 2015: Organizer, 2015 Combinatorics Workshop (CW2015), CAMP, NIMS, Daejeon, Korea.
July 2015: Member, Organizing Committee, FPSAC 2015, KAIST, Daejeon, Korea.
May 2015 - July 2015: Organizer, 2015 NIMS Thematic Program on Combinatorics, NIMS, Daejeon, Korea.
Apr. 2015: Member, Organizing Committee, 2015 KMS spring meeting, Pusan National University, Pusan, Korea.
Feb. 2015: Organizer, Algebraic Combinatorics School 2015 (ACS2015), KIAS, Seoul, Korea.
Apr. 2014: Organizer, Enumerative Combinatorics School 2014 (ECS2014), NIMS, Daejeon, Korea.
Aug. 2013: Organizer, 2013 Combinatorics Workshop (CW2013), CAMP, NIMS, Daejeon, Korea.
May - Dec. 2013: System Developer, Online submission system for NANUM 2014, ICM 2014 Invitation Program, Seoul, Korea.
May 2013: Member, Program Committee, KIAS Workshop on Combinatorics, KIAS, Seoul, Korea.
Mar. 2013: Organizer, Enumerative Combinatorics mini Workshop 2013 (ECmW2013), Ladena Resort, Chuncheon, Korea.
Feb. 2012: Organizer, Enumerative Combinatorics mini Workshop 2012 (ECmW2012), KAIST, Daejeon, Korea.
Aug. 2011: Local organizer, 2011 Combinatorics Workshop (CW2011), Kangwon National University, Chuncheon, Korea.
Aug. 2007: Staff, 2007 Combinatorics Workshop (CW2007), KAIST, Daejeon, Korea.
Educational activities
Sep. 2011 - Dec. 2019: Organizer, Computation of the week, Inha University, Incheon, Korea
Military service
Jan. 2015 - Dec. 2017: Civil Defense (민방위), Incheon, Korea
Mar. 2011 - Dec. 2014: University Reserve Forces (직장예비군), Inha University, Incheon, Korea
Sep. 2007 - Feb. 2011: Regional Reserve Forces (지역예비군), Incheon, Korea
Jan. 2007 - Aug. 2007: University Reserve Forces (직장예비군), KAIST, Daejeon, Korea
1 Mar. 2003 - 14 Nov. 2006 (44.5 months): Technical Research Personnel (전문연구요원), KAIST, Daejeon, Korea