E-in-C is a PSO and Head of the Corps of Engineers including Military Engineering Service. He is an advisor to Chiefs of Army, Navy and Air Staff and Ministry of Defence on all matters pertaining to engineer works services. E-in-C Branch manages all aspects of military infrastructure pertaining to Defence Services, formulates Stores policy/procedures in respect of Engineer Stores, Engineer Plants and Machinery of Engineer Origin, deals with all personnel matters in respect of offrs, JCO's and OR of Corps of Engineers and MES and formulates Technical Instructions/Standards for infrastructure development for Army, Navy and Air Force.