From 1980-1991 he was employed at the Foreign Service Institute, U.S. Department of State, where he served as Language Training Supervisor in Mandarin, Cantonese, Japanese, and Mongolian; as Principal of the advanced Chinese field school in Taiwan; and as Chair of the Department of Asian and African Languages. Since coming to Williams in 1991, he has chaired the former Department of Chinese and Asian Studies Program as well as, for a total of 14 years, the Department of Asian Studies, which he was instrumental in founding. He has also taught at Eisenhower College, Portland State University, Middlebury College, National Taiwan Normal University, and Chinese University of Hong Kong. Kubler, who is author or coauthor of 15 books and over 50 articles on Chinese language pedagogy and linguistics, frequently serves as reviewer or consultant for Chinese and Asian Studies programs in the U.S. and overseas. He has served as Chair of the Test Development Committee for the SAT Subject Test™ in Chinese and as member of the Executive Committee of the Association of Departments of Foreign Languages of the Modern Language Association.