Sierra Circuits Sierra Circuits (also known as Sierra Proto Express) is a company that manufactures and assembles printed circuit boards. | ![]() Unicircuit Unicircuit is a company that manufactures printed circuit boards for mission-critical, high-reliability, and time-sensitive products. | |
Founding Date | Founding Date 1986 | Founding Date 1979 |
Type | Type Private | Type Subsidiary |
Tags | ||
Locations | Locations Sunnyvale, US HQ Delta, CA | Locations Littleton, US HQ Littleton, US Littleton, US Santa Ana, US St. Louis, US |
Employees | Employees 478 | Employees 213 |

Unicircuit is a company that manufactures printed circuit boards for mission-critical, high-reliability, and time-sensitive products.
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