Difference between IAS and IES | Guide to UPSC

IAS and IES are two units of the Union Government. IES represents Indian Engineering Services, and IAS stands for Indian Administrative Services. Both examinations are conducted by the Union Public Service Commission (UPSC).
The difference between the two is that IAS officers are employed in the administrative or managerial division of the Indian Government. While the IES officials are delegated to handle the executive and technical works of the Indian Government.