• Lecturer, Graduate School of Languages and Communication, National Institute of Development Administration, Thailand (2017-Present)
• Graduate Research/Teaching Assistant, Department of Linguistics and Languages, Michigan State University, USA (2013-2017)
• Lecturer, Division of English for Business, Chulalongkorn University Language Institute, Chulalongkorn University, Thailand (2010-2013)

Articles in refereed journals

• Supasiraprapa, S. (2019). Frequency effects on first and second language compositional phrase comprehension and production. Applied Psycholinguistics, 40, 987-1017.
• Supasiraprapa, S. (2018). Prototype effects in first and second language learners: The case of English transitive semantics. Bilingualism: Language and Cognition, 21, 618–639. 
• Supasiraprapa, S. (2018). Second language collocation acquisition: Challenges for learners and pedagogical insights from empirical research. Journal of Asia TEFL, 15, 797–804. 
• Supasiraprapa, S., & De Costa, P. I. (2017). Metadiscourse and identity construction in teaching philosophy statements: A critical case study of two MATESOL students. TESOL Quarterly, 51, 868–896. 

Book review

• Supasiraprapa, S. (2018). Review of the book Understanding, evaluating, and conducting second language writing research, by Charlene Polio and Debra Friedman. NIDA Journal of Language and Communication, 23, 98–99.

Commercial book

• Supasiraprapa, S., Prapobratanakul, C., & Damrongmanee, M. (2016). 850 คำต้องรู้สู้ TOEFL และ CU-TEP [850 Essential Words for the TOEFL and Chulalongkorn University Test of English Proficiency (CU-TEP)]. Bangkok, Thailand: Chulalongkorn University Printing House.

Editorial work for academic journals

• [2018-present] Editorial committee member for PASAA, an English language learning and teaching journal published by Chulalongkorn University Language Institute, Thailand.
• [2011-2013] Editorial board member for PASAA, an English language learning and teaching journal published by Chulalongkorn University Language Institute, Thailand.

Guest commentator/ lecturer

• [2019] Guest commentator for the 35th Doctoral Dissertation Seminar organized by the English as an International Language (EIL) Program, Chulalongkorn University, Bangkok, Thailand, on December 17, 2019.
• [2019] Guest lecturer on the topic of instructed second language acquisition for the second language acquisition course offerred by the MA program in English for Professional Development at the School of Liberal Arts, Mae Fah Luang University, Chiang Rai, Thailand, on April 21-22, 2019.
• [2018] Guest commentator for the Master's and Doctoral Dissertation Seminar organized by MA and PhD Programs in English for Professional Development at the School of Liberal Arts, Mae Fah Luang University, Chiang Rai, Thailand, on December 1-2, 2018.

Research abstract, manuscript, and conference proceeding review

• [2018-present] Reviewer for manuscripts submitted for publication in NIDA Journal of Language and Communication.
• [2019] Research paper and poster reviewer for the conference marking the 53th anniversary of the National Institute of Development Administration on March 29, 2019.
• [2018] Research abstract reviewer for the 2019 Conference of the American Association for Applied Linguistics (AAAL), held on March 9-12, 2019, in Atlanta, Georgia, USA 
• [2018] Conference proceeding reviewer for The Seventh International Conference on Advancement of Development Administration (ICADA) 2018, organized by National Institute of Development Administration, Bangkok, Thailand, on May 31- June, 2, 2018
• [2017] Research abstract reviewer for the 2018 Conference of the American Association for Applied Linguistics (AAAL), held on March 18-21, 2018, in Portland, Oregon, USA 
• [2017] Reviewer of research abstracts and proceedings for the 2017 International Conference on Language and Communication (ICLC), organized by Graduate School of Language and Communication, National Institute of Development Administration, Bangkok, Thailand, on November 30 - December 1, 2017
• [2015] Reviewer of manuscripts submitted for publication in volume 99 of Modern Language Journal.

External thesis or dissertation committee member or research instrument examiner

• [2019] Research instrument examiner for a master's thesis project of a student in the MA program in Applied Linguisitcs at Mahidol University, Bangkok, Thailand.
• [2019] External committee member for dissertation and master's thesis defenses of students in the MA and PhD programs in English for Professional Development at the School of Liberal Arts, Mae Fah Luang University, Chiang Rai, Thailand, on May 10, 2019.

Others

• [2011-2013] English test item writer for Chulalongkorn University Academic Testing Center, Thailand
• [2011-2013] Translator for Academic Services Center, Chulalongkorn University Language Institute, Thailand
• [2010-2012] English instructor for Government Personnel Development Center and Academic Services Center, Chulalongkorn University Language Institute, Thailand