Service and Maintenance

For PEACE OF MIND call us at 631-567-8000

GLS offers full maintenance service for electrical, technology and security emergency and preventive needs. We dispatch highly skilled technicians for troubleshooting and repair services, as well as a fleet of stocked service and maintenance vehicles (including aerial equipment) to our clients, available for 24/7 emergency service with a 2-hour response time.


  • Wide variety of testing equipment including IR Camera, Ground Resistance Testers, etc.
  • Indoor & Outdoor lighting upgrades
  • Generator Installation
  • Lamp & Ballast Replacement
  • Wide variety of vendor relationships to assist in getting hard to find material in a timely fashion

Technology and Security

  • Network Physical Infrastructure Analysis
  • Fiber Testing and OTDR for Fault Location and Emergency Splicing
  • Security Analysis to determine Visual, Monitoring and Recording Errors

Fire Alarm

  • Fire Alarm Central Station Monitoring
  • Fire Alarm Maintenance Agreements
  • Fire Alarm Inspections
  • Fire Alarm 24/7 Service