Which is the best field in engineering? Civil engineering: Undoubtedly the most populated engineering field, civil engineering accounts for roughly 274,000 job positions. A civil engineering degree prepares you for work in the construction industry as well as in the business, management and financial sectors. Petroleum engineering: As technology is advancing, new fields like petroleum engineering, geoinformatics, mechatronics, etc. are emerging and creating new job opportunities for engineering aspirants.