About Us

McDonald Machine was founded in 1979, in Belmont, California, near the heart of the Silicon Valley during the onset of the technology revolution. We incorporated in 1982 and in the same year relocated to Sonora, California.

Relocating assisted in MMi's growth. The area enabled us to recruit, develop and retain talented and innovative employees from the surrounding communities. The foothills has given MMi the advantage of a lower cost of living and a better quality of life.

Our campus has grown from an original 8,000 square foot facility to a 23,000 square foot, state of the art manufacturing facility.

Machine Shop
committed to excellence