With more than 100 years of life safety and security experience, Underwriters Laboratories® has the expertise to help protect lives and property. A dedicated team of life safety professionals makes UL the most prominent and trusted source for the industry. LaMarco Systems is a UL Listed Alarm Service Company, which means that we do installation of fire alarm and security systems according to the highest standards by UL. We are authorized to issue UL Certificates of Compliance for our installations. UL continuously monitors our operations and make spontaneous checks of the systems we design and install to ensure compliance with standards and the highest level of quality.