TRI-M-CO is a sheet metal fabrication contractor that has been in business for over 60 years!!! Based in San Marcos, California, we specialize in sheet metal fabrication, machining, paint, silkscreen, welding and assembly. We provide solid models from all major computer-aided design and computer-aided manufacturing systems for assemblies of product such as pro-E, solid works, solid edge, solid designer, sheet adviser and catia, to name a few. The company deals with chassis, front panels, enclosure and tooling products.