With over 25 years of teaching experience at the tertiary level, he has covered as wide range of areas in his teaching including academic writing, written business communication, English for Specific Purposes, and career-related English skills, both in the undergraduate and graduate levels. He also specializes in teacher training in Thai contexts with a focus on English teachers' language skills and professional development for primary and secondary education. His research interests involve second language writing, written discourse analysis, and interlanguage pragmatics.