Construction of sports facilities, buildings, telecommunication towers, building foundations, land improvements, namely, dynamic soil compaction, soil replacement and displacement, preloading soil by filling and vacuum compression, consolidation and stabilization of the soil, soil improvement with microbial injection, moisture barriers and pre-wetting, particle injection, chemical injection, mixing methods, jet grouting, compaction injections, compensation injections, and ground reinforcement, land containment systems, namely, reinforced soil structures, concrete walls and metal meshes, civil constructions in the nature of tunnels, bridges, buildings, dams, civil infrastructures, namely, water treatment plants, gas and electricity plants, railways, roads, docks, tunnels, canals, ports, shopping centers, industrial buildings, and train and subway stations; repair of sports facilities, buildings, telecommunication towers, building foundations, land containment systems, namely, reinforced soil structures, concrete walls and metal meshes; installation of electrical systems, equipment for kitchens, windows, energy generation and distribution systems namely power plants, wind farms, electrical distribution networks and water supply, namely wells, cisterns, tanks, water distribution networks, equipment for sports facilities, namely, electronic scoreboards and signs, telecommunications systems, and of equipment for tunnels, bridges, shopping centers, industrial buildings, and train and subway stations in the nature of lighting, ventilation, surveillance, control and signaling systems