Mac Cal is a vertically integrated manufacturing company founded in 1964 and based in San Jose, California. They specialize in precision sheet metal fabrication, CNC machining, cable and electro-mechanical assemblies, and finishing services such as painting and silk-screening—all under one roof. Serving industries including aerospace, defense, biomedical, clean energy, semiconductors, and transportation, Mac Cal delivers engineered solutions from prototypes to full production runs. With ISO 9001 and ISO 13485 certifications, the company is committed to speed, quality, and service, streamlining manufacturing with reduced supply chain complexity and fast lead times.