I worked at Siam Cement full-time (More than 3 years)
Stable profitable company that spares no expense in administering and catering to its clients
Very political. Little or no opportunity for advancement if you are not a Thai national even if you speak read and write Thai . As others have stated, very bureaucratic and employees are rarely rewarded for innovation or exceeding expectations and goals. Once in, poorly performing employees are usually never disciplined.
I applied through an employee referral. The process took 2 weeks. I interviewed at Siam Cement (Bangkok (Thailand)).
Submitted CV through a friend working there, got a call immediately the next day, got an interview with HR then with recruiting committee (MD/DIvision manager/Department manager)
Salary is fixed, so no negotiation there, except you already have some work experience, then they will give you experience pay.