RITES, Dedicated Freight Corridor Corporation of India Limited etc. General Management: Like all other IR Engineering (IRSE, IRSEE, IRSME) and Civil service Cadres (like IRTS, IRPS and IRAS), the IRSSE has the responsibility of contributing to the General management of railways. In IR, the general management posts are GM (general manager), AGM (Addl. GM), SDGM (Senior Deputy General Manager), CPRO (Chief Public Relations Officer), DGM (Deputy General Manager) etc. at Zonal level and DRM (Divisional Railway Manager), ADRM (Addl. DRM) at Divisional level. They have also to contribute for posts of CSO (Chief Safety Officers), Sr. DSO and Sr. EDPM. Organisation APEX LEVEL :The S&T Organization is headed at apex level (i.e. Railway Board, Ministry of Railways) by Member (S&T) (Member (Signal & Telecom) ex-officio secretary to Government of India. He is assisted by two Additional Secretary to Government of India rank (equivalent to GM) officers v.i.z Additional Member (Signal) and Additional Member (Tele), Who are in turn assisted by Joint Secretary to Government of India rank officers viz. Advisor (Signal) and several Deputy Secretary to Government of India rank executive directors and directors. S&T Officers may go to general management or ex- cadre posts like AM-IT, AM-Plg etc. The posts of Menmber(Staff)-till date is also ex-cadre in Railways, and an IRSSE may also get to become Member(Staff) also. The posts of CRS and CCRS are also ex-cadre for Technical and Traffic wing, and an IRSSE may opt for becoming CRS or CCRS also at the apex level. ZONES :The Indian Railways has 17 Zonal Railways with an average Track length of about 4000 km and average staff strength of about 80,000 headed by GMs. The Zonal Organizational structure of Signal Engineers is headed by HAG/SAG grade IRSSE officer designated as PCSTE (Principal Chief Signal & Telecom Engineer) who is assisted by various SAG officers designated as CSE (Chief Signal Engineer), CCE (Chief Communication Engineer), CSTE (Planning), CSTE(Projects) and CSTE(Construction) and SG/JAG, SS & JS grade officers designated as Dy CSTEs, SSTEs and ADSTEs. In ex-cadre establishment, the General Manager, Addl.GM, SDGM, Secretary, CPRO posts are also ex-cadre, and an IRSSE Engineer may occupy these posts also. The post of CSO(chief Safety Officer) has also been made ex-cader for Technical and Traffic Officers in Indian Railways, and on-time, two of the posts of CSO in two Zonal Railways are for S&T cadre. Zones do have posts of CM(IT), DyCM(IT) and