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 2008 | Founding Date 1979 |
Type | Type Private | Type Subsidiary | Type Subsidiary |
Tags | |||
Locations | Locations Sunnyvale, US HQ Delta, CA | Locations San Jose, US HQ Shanghai, CN Shinjuku City, JP | Locations Littleton, US HQ Littleton, US Littleton, US Santa Ana, US St. Louis, US |
Employees | Employees 478 | Employees 3334% increase | Employees 213 |
Operating ⚠ | |||
Product Categories | Product Categories 3 (Jun, 2024) | Product Categories 4 (Sep, 2023) | Product Categories N/A |

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