telecommunications industry infrastructure construction, installation, and maintenance services, namely, planning, laying out, constructing, installing, and maintaining external telecommunications systems supporting global communications networks, electronic commerce, and related applications; telecommunications industry construction, installation, and maintenance services, namely, planning, laying out, installation, monitoring and maintenance of internal telecommunications systems, namely, internal voice, video, data, and computer networks and systems; telecommunications industry installation and maintenance services, and related components for central offices, data storage centers, co-location facilities, web-hosting facilities and similar facilities, namely planning, laying out and installing central office equipment; public service utility industry construction, installation, and maintenance services, namely, planning, laying out, constructing, and maintaining external networks utilized in the public service utility industries, namely, without limitation the electrical, gas, water, and sewer industries; infrastructure construction, installation, and maintenance services in the field of traffic safety, namely, planning, laying out, constructing, installing, and maintaining traffic signals, road signs, guardrails, and driver information networks and systems smart highways; commercial construction and building renovation services, namely, planning, laying out, and custom construction and renovation of commercial structures

engineering design and technical consulting in the telecommunications industry; engineering design and technical consulting in the public service utility industries, namely, without limitation the electrical, gas, water, and sewer industries; engineering design and technical consulting for use in connection with traffic safety systems