National Service Alliance NSA, a Quad Plus brand

National Service Alliance - Houston LLC, a Quad Plus company, is a system integrator specializing in electrical control, automation, and field services for petroleum, oil, gas, and marine industries. We offer expertise in drilling, well completion, and manufacturing systems, retrofitting obsolete equipment, and designing new systems. Our team provides implementation and support services for domestic and international projects, with a deep understanding of OEM products and compliance standards.