Job description: Responsible for facility upgrade & modification activities, resolving the facility-related problems affecting day-to-day operations, facility capacity increase under operating conditions in the M1 Metro Line (26,1km)-M1 Yenikapı Ext,ension Overhead Catenary System Installation, Test and Commissioning -M1B Otogar-Kirazlı Extension Line Rigid Catenary and Electrification System Installation, Test and Commissioning -Preparing technical specification document of Catenary and Electrification System including researching feasibility and applicability, Requirements, Standards(such as IEEE, IEC), Safety, Migration Strategies for M1 -M3 Line -Calculating voltage drops and critical long-distance short currents, and upgrading relay protection set values corresponding to increased load demand and operational capacities-Replacing and renewing 6 of power substations, including MV and LV switchgear systems (under operational conditions-Developing training programs on work safety and health, maintenance procedures -Developing and preparing maintenance management system by defining and implementing system, subsystem and equipment coding and also classifying and describing activity codes for protective and corrective maintenance.