GLS has set the mark for excellence in the electrical, technology and security construction / services industry for over 49 years. Our consistently high ratings as an experienced, reliable and safety conscious electrical contractor in the Long Island and NYC area have won us the loyalty of some of the most respected clients on Long Island. We are dedicated to maintaining our mission of excellence in quality, professionalism and safety in the workplace, as well as on-time performance, as we light up Long Island and New York for even more decades to come. GLS’s vision affects the company, employees and client culture as well as the environment. Together, GLS creates design solutions to the greatest challenges facing our clients and society.