please I need someone who is knowledgeable about certification and getting a job in the oil and gas sector. I have masters degree in mechanical engineering, but confused about the certification to write in order to get a job in oil sector.I wanted to write any of the following certification CSWIP,API 577,PMP or cost engineering certification,but my friend said that the listed certifications are common,that I should find out more about drilling certifications or training. please can someone advice on what certification to write so that I can get a job in that sector. this is my e mail address donaldmayor@mail.com

how can I become a drilling engineer without studying petroleum engineering..