We deal with electrical engineering, applied to power generation, distribution and user facilities, and to small current systems: networking, automation, safety & security, multimedia. Our experience is bonded to critical infrastructures for service continuity (telecommunications stations, data centers, control buildings, utility networks, airports, hospitals, ships), to industrial plants and advanced service facilities. A consistent part of our activity is focused to the problem-solving of practical issues, related to the operation of already running systems or under commissioning: technical acceptance test, fault discrimination study and protection relay setting, risk assessment, failure analysis, power quality survey, electromagnetic pollution survey, and other checks, based on “in situ” field-measurements and computer simulations. Our knowledge-base comes from 10 years dedicated to construction, and since 2004 to engineering, and we feed it constantly with the experiences of new cases, with our updating and with the investment in technical resources of important aid to our job.