The Administrative, technical and managerial positions associated with Rail transport are usually Categorised as Group A services. The recruitment is through UPSC Exam followed by Mains and Interview. Then there is also IAS and Allied Services Entrance Exam and Indian Engineering Services Exam. Indian Allied Services Exam is conducted by UPSC for Indian Railway Traffic Services, Indian Railway Account Services, Indian Railway Personnel Services, etc. And for Engineering Service Exam, UPSC holds exam for all Group A services of Engineering. There are 5 Engineering Cadres recruited namely Indian Railway Service of Engineers, Indian Railway Service of Mechanical Engineers, Indian Railway Service of Electrical Engineers, Indian Railway Service of Signal Engineers, Indian Railway Stores Service.