Gemellaro Systems Integration® brings world-class expertise to the design, deployment, and maintenance of physical security systems. Our specialists are recognized for delivering innovative solutions using the best equipment in the industry. Grounded in experience and regional awareness, we develop systems designed to perform in demanding environments—serving clients across Southeast Michigan and beyond.

We understand that strong design is essential to effective security. From video surveillance and access control to intrusion detection and perimeter protection, our team ensures that every system is thoughtfully engineered to keep your people and property safe. With deep technical knowledge and a commitment to excellence, we deliver peace of mind alongside performance.

Client safety is at the center of every project we undertake. To provide the best results, we remain manufacturer agnostic—allowing our team to focus on value engineering and selecting the right hardware at the right price for each unique environment.

Our standards are set high, and so is our expertise. GSI’s senior designer/estimator holds the Certified Protection Professional (CPP) credential—an ASIS-sponsored certification and the industry’s highest recognition in security management. This advanced expertise informs every design decision and reinforces our commitment to delivering security systems you can trust.