Providing engineering services in the transmission and distribution network, overhead or rail network, signaling system, telecommunication system, automatic ticket collecting system, intelligent management system of building, SCADA system, ventilation system, fire alarm system, elevator and escalators, electrical and mechanical installations, feasibility study, site selection and designing of lines, stations, terminals and depots, geotechnical studies, surveying, infrastructure, environmental studies, structural design, architecture and urban planning, interior design of the stations.