• Associate Editor, Glossa: a Journal of General Linguistics, Jan 2016 - Dec 2018.
  • Associate Editor, Lingua: an International Review of General Linguistics, March - Dec, 2015.
  • Chair, 30th Japanese/Korean Linguistics Conference (JK 30), March 11-13, 2023.
  • Co-chair, 33rd West Coast Conference on Formal Linguistics (WCCFL 33), March 27-29, 2015.
  • Program co-chair,  11th International Conference on Tree Adjoining Grammars & Related Formalisms (TAG+11), Sept 26-28, 2012
  • Co-organizer, Western Conference on Linguistics (WECOL 2011), Nov 18-20, 2011.
  • Co-organizer, 20th Semantics and Linguistic Theory Conference (SALT 20), April 29 - May 1, 2010.
  • Co-organizer, 2nd International Conference on East Asian Linguistics (ICEAL 2), Nov 7-9, 2008.
  • Co-organizer, 24th West Coast Conference on Formal Linguistics (WCCFL 24), March 18-20, 2005.
  • Co-organizer, 7th International Workshop on Tree Adjoining Grammars and Related Formalisms (TAG+7), May 20-22, 2004.
  • Program committee, Linguistic Society of America (LSA), 2011, 2012, 2013. 
  • Program committee, International Workshop on Tree Adjoining Grammars and Related Formalisms (TAG+), 2006, 2008, 2010.
  • Program committee, 6th International Workshop on Linguistically Interpreted Corpora (LINC-2005), 2005.
  • Co-editor, Proceedings of the 24th West Coast Conference on Formal Linguistics. Eds. John Alderete, Chung-hye Han and Alexei Kochetov, Cascadilla Press, Somerville, MA, 2006.
  • Editorial board, The Canadian Journal of Linguistics, Jan. 2009 - April 2012.
  • Editorial board, Journal of East Asian Linguistics, since Jan. 2007.
  • Editorial board, Language Research, Journal of Language Education Institute, Seoul National University, 2006 - 2015.
  • Editorial board, Language and Information, Journal of the Korean Society for Language and Information, 2003 - 2014.
  • Reviewer, Journal of East Asian Linguistics, 2004, 2005, 2007, 2009, 2010, 2011.
  • Reviewer, Journal of Comparative Germanic Linguistics, 2004.
  • Reviewer, Journal of Linguistics, 2004, 2007.
  • Reviewer, Journal of Semantics, 2007, 2008. 
  • Reviewer, Language and Information, 2003, 2004, 2007.
  • Reviewer, Language Research, 2007.
  • Reviewer, Lingua, 2009. 
  • Reviewer, Linguistic Inquiry, 2008.
  • Reviewer, Linguistics, 2007.
  • Reviewer, Natural Language Semantics, 2006.
  • Reviewer, Natural Language & Linguistic Theory, 2005, 2006, 2007, 2010.
  • Reviewer, The Canadian Journal of Linguistics, 2006.
  • Reviewer, Annual Meeting of North East Linguistic Society, 2010 
  • Reviewer, Annual Meeting of the Linguistic Society of America, 2007, 2010. 
  • Reviewer, Japanese/Korean Linguistics Conference (JK), 2005, 2006, 2007, 2009, 2010, 2011.
  • Reviewer, West Coast Conference on Formal Linguistics (WCCFL), 2004, 2005, 2006, 2007, 2009, 2011.
  • Reviewer, Western Conference on Linguistics, 2002, 2007.
  • Reviewer, Penn Linguistics Colloquium, since 1998.