Hello aspirant,

After completing petroleum engineering and if you want to pursue NEBOSH safety course, then you can go for NEBOSH-IGC program or later on diploma in NEBOSH, CSP or IOSH memberships and so on. But, you ought to have a diploma certificate in industrial safety done under a government identified institute. You need to have completed your diploma  or B. Tech degree in any engineering branch and must have gained work experience in any industry not less than two years or experience not less than five years in research in any industry. He/She should have sufficient idea of the local language working in the industry of the respective area, i.e. if you're working in Tamil Nadu, you must know Tamil. Until and unless, you follow these rules, you won't be allotted as an officer in the safety department.

Hope, it helps you.