Sierra Circuits Sierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards. | ![]() Calumet Electronics Calumet Electronics is a company that designs and manufactures printed circuit boards (PCBs). | |
Founding Date | Founding Date 1986 | Founding Date 1968 |
Type | Type Private | Type Private |
Tags | ||
Locations | Locations Sunnyvale, US HQ Delta, CA | Locations Calumet, US HQ |
Employees | Employees 478 | Employees 1186% increase |

Calumet Electronics is a company that designs and manufactures printed circuit boards (PCBs).
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