Dear sir or madam,
I am a Khmer and expertise on subtitling and translation in English into Khmer. I have read your post and it is suitable for my expertise. I used some programs for my daily work like AegisSub, Subtitle edit, etc. I worked with many companies in Asia and Europe for subtitling both Khmer and English. I have personal Youtube with 30% of my video has subtitles in Khmer language. I can handle this project and back to you within 7 days with quality assurance. Let me know if we can talk more about this.
Thank and best regard,
Chantha