8Disciplines
100%In-House
USANationwide
A design and engineering firm for homeowners, contractors, and the teams that deliver exceptional work. We design and plan the systems — components follow as a downstream capability when you want one accountable source.
Diamond SPI is a design and engineering firm. We deliver system design, planning, and integration so your projects perform exactly as intended. Once the design is locked, we can fabricate the custom components and source the equipment — but the design is what we sell.
Deep engineering expertise meets in-house fabrication. Every system we design and every component we produce reflects a single standard: built right, the first time.
Homeowners, contractors, integrators, and developers all work with us directly — whether it's a single upgrade, a multi-site build, or a component sourcing run. No project is too small, and you don't have to be a trade pro to work with us.
Decades of combined experience across engineering, integration, and field operations — every project led to one standard: built right, the first time.
In-house fabrication of custom components built to exact specs. We control every step from prototype to production for consistent quality and fit.
We design across every major automation and control platform, so our solutions integrate seamlessly with any ecosystem your project requires.
Deliverables prepared to professional engineering standards — single-line diagrams, equipment schedules, coordination studies, and submittal packages ready for AHJ and engineering review.
Homeowners, contractors, integrators, and developers all work with us directly. We support your project, not gatekeep it — the same engineering depth and in-house fabrication, at any scale.
From AV signal flow and lighting load calculations to medium voltage coordination studies and surge protection per NFPA 70 — our expertise spans the full spectrum of building technology systems.
Turnkey supply of AV, lighting, automation, and electrical protection components — sourced, specified, and delivered commercial-grade to your project site anywhere in the United States.