Complex sentence: He is adamant about working in a job related to his field only and is unwilling to accept any other position, which means he often comes into conflict with his father (Samuthirakani), who considers him irresponsible.
Split into simpler sentences: He is adamant about working in a job related to his field only and is unwilling to accept any other position. He often comes into conflict with his father (Samuthirakani), who considers him irresponsible.