Since 1960, Harger has been providing solutions to the lightning protection and grounding industries. They have experience in all facets of these markets, including engineering, systems design, product manufacturing and installation. Their engineering department provides design services for engineers and contractors domestically, as well as internationally.

Harris Electric expanded again in the late 1930s when Vic Sundholm joined the firm. Soon, industrial design and large vessel wiring emerged as two other services for which Harris Electric became known.

Hawkeye Electric is a commercial, residential, and industrial electrical contractor located in Cedar Rapids and Dubuque, Iowa.

Helix Electric is an award-winning electrical contractor specializing in design-build and highly complex electrical projects throughout the United States. An established industry leader, Helix Electric has decades of experience and expertise in nearly every field of construction, including mission-critical, data center, medium voltage power distribution, renewable energy, commercial, industrial, mass transit and rail, and high-density residential

Hirose Electric USA is a subsidiary of Hirose Electric Co., Ltd., one of the world's leaders in developing and manufacturing electric and electronic connectors. Hirose's vigorous international strategy rests on three pillars: strong capital investment, a highly skilled labor force, and close contact with the product development divisions of client manufacturers throughout the world.

Hitachi commits to helping achieve a sustainable world and people's well-being by utilizing their breadth of digital and green technologies. Since its founding in 1910, Hitachi has responded to the expectations of society and its customers through technology and innovation. They work to apply their expertise in information technology (IT), operational technology (OT), and a wide variety of products to advance social infrastructure systems.

Hitachi Astemo, Ltd. mission is to work on solving various social issues and to create a better future by providing advanced mobility solutions. In addition to reducing traffic accidents and traffic congestion, we aim to reduce the burden on the environment by cleaning exhaust gas and improving fuel efficiency to contribute to the realization of a society that is both people- and eco-friendly.

Hitachi-Comark is a highly specialized company with more than 50 years of continuous activity and experience in the field of high power RF Technology.

Homer Electric Association, Inc. (HEA) is a member-owned electric utility serving the central and southern areas of the Kenai Peninsula in Alaska. The Cooperative provides affordable, reliable, quality energy services to its members and is governed by a nine-member elected Board of Directors.

Honeywell is a Fortune 100 company that invents and manufactures technologies to address tough challenges linked to global macrotrends such as safety, security, and energy. With approximately 110,000 employees worldwide, including more than 19,000 engineers and scientists, it has an unrelenting focus on quality, delivery, value, and technology in everything it makes and does.

Housing Solutions provide good quality, affordable homes to rent and buy across the South East of England. They own, manage and maintain more than 7,500 homes, across seven local authorities in and around the Maidenhead area. They offer a wide range of housing options, including affordable homes to rent, properties to buy under shared ownership, market rent properties and specialist accommodation for older people and people who need care.

Howe Electric began as a small electrical contracting business in 1949 in Fresno, California. It was incorporated ten years later as Howe Electric, Inc. They provide Electrical Engineering (Design), Electrical Engineering (Design-Build), BIM Solutions (Building Information Modeling), Design-Build Construction, Value Engineering, Construction Management, Net Zero Energy, Electrical Engineering and much more.

By combining our estimating experience with our in-house Engineering Department, Howell is able to provide the highest quality electrical construction for the most efficient cost in the shortest construction schedule possible.

Hugh O’Kane Electric Company has delivered telecommunications installation, electrical maintenance services, and electrical contracting for businesses and institutions in the New York City area. HOK’s technicians are knowledgeable about NYC’s electric and telecommunications infrastructure, and the expansion of 5G and Wifi services in NYC.

Ideal Electric Company, formerly known as Hyundai Ideal Electric Co., is a globally established American manufacturer of electric motors and generators, switchgear, and control systems for all applications including industrial, oil, gas and petrochemical, water and infrastructure, pulp and paper, air handling, marine, mining, power generation, and renewable energy.

Intermountain Power Agency (IPA) is located in the Great Basin region of western Utah, USA. They generate an average of more than 13 million megawatt hours of energy each year from their two coal-fired units. The energy is delivered over the project’s AC and DC transmission systems to 35 participants in the project that principally serve Utah and Southern California, USA.

International Brotherhood of Electrical Workers (IBEW) represents approx. 775,000 active members and retirees, who work in a wide variety of fields, including utilities, construction, telecommunications, broadcasting, manufacturing, railroads and government. The IBEW has members in both the USA and Canada, and stands out among the American unions in the AFL-CIO, because it is among the largest and has members in so many skilled occupations.

Backed by 45 years’ experience in the manufacture of frequency products, IQD is a recognized market leader in the frequency control market and part of the Würth Elektronik eiSos group, one of the leading European manufacturers of passive components. With active customers in over 80 countries, IQD offers one of the most comprehensive frequency product ranges available.

Jabil is a manufacturing solutions provider with over 250,000 employees across 100 locations in 30 countries. The world's major brands rely on Jabil's unmatched breadth and depth of end-market experience, technical and design capabilities, manufacturing know-how, supply chain insights and global product management expertise.

JIS Electrical Trading LLC is an ultramodern establishment with over 20 years of experience in the Middle East Region. With a team of highly skilled and devoted experts focusing on providing our customers with the finest quality and cost-effective electrical and marine components especially Low Voltage Switchgear components supplied from European Manufacturers.

Julian Electric is a globally renowned manufacturer of quality battery & power cables & wiring harnesses to mobile equipment OEMs.

K2 Electric has been providing exceptional work throughout the state with its Preconstruction, Construction & Service Departments. They are pioneers in the Arizona commercial, industrial & photovoltaic electrical contracting fields.

With the vision - 'Together, we are always in the lead and contribute to a smarter city to live and work in',​ Landskrona Energi lead the future of electricity, district heating and fiber in Landskrona City, in Skane, Sweden. It is equally important that we help shape our city through smart digital and sustainable faith in the future. Our 110 employees ensure that 25,000 customers receive electricity, district heating and communication services.

Lighthouse Electric Company, Inc. was formed in March of 1984 as an electrical contracting firm, and we continue to maintain a focus on commercial, institutional and industrial projects. They are a member of NECA (National Electrical Contractors Association) and BICSI (Building Industry Consulting Service International).

Lighting Associates, Inc. stands dedicated as the architectural lighting sales industry's best provider of top quality lighting, efficient service, and knowledgeable design assistance for commercial, industrial, hospitality and other applications.

Lincoln Electric is the pioneer in arc welding, robotic welding systems, plasma and oxyfuel cutting equipment and brazing and soldering alloys. Headquartered in Cleveland, Ohio, Lincoln has a worldwide network of manufacturing, distribution, sales and technical support covering more than 160 countries.

Loeb Electric offers a full menu of electrical, lighting, and data communication products and services. They work with both the central Ohio market, as well as companies with multiple locations across North America.

Lowe Electric Company is completely committed to excellence through dependability, quality, and service. With this commitment, they provide full-service diversified electrical wholesale at a competitive price.

Luceco Group is a global business that manufactures and distributes high quality and innovative LED lighting products, electrical wiring devices and accessories, portable powering solutions, audio-visual and home entertainment products worldwide.

Lutron Electronics is a manufacturer of energy-saving light, shade, and temperature controls for new and existing homes and offices.