Tests and Interviews. Normal process like other company does. Be yourself and be content. Also be positive and friendly with proper manner. Well-dressed up (formal) is suggested. After you passed the test, you will be called for interview. Number of interviewer is various, normally there are three people interview you in Thai and English.

Accually I did not apply at PTTEP at the first place but recruitment agency call me to bring me to interview. But it's not related with my field job and my qualification is not suitable with this job.