Union Public Service Commission or UPSC holds IES each year. The engineering service examination is conducted for recruiting aspiring engineers to various posts in Indian Engineering Services. IES is also known as ESE (Engineering Services Exam).IES 2019 comprises of three stages- Prelims, Mains and finally Personal Interview. The preliminary exam is an objective paper and the Mains exam is a conventional paper. Candidates must have to clear prelims to appear for Mains examination.