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Sierra Circuits, INC.

Doing business as Sierra Circuits INC
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www.protoexpress.com
Homepage of Sierra Circuits, INC.
Their homepage, crawled AUG 1, 2026
At a glance
Employees100-499
In business sinceNot reported
HeadquartersSunnyvale, CA
SAM.gov UEIECTJB433GHK9
CAGE code0ZHS4
Incorporated inCA
LEI5493000LBL7BS4M2GR93
LISTED ON FACTORYREGISTRY100%SOURCE COVERAGE

Sierra Circuits manufactures printed circuit boards (PCBs) and provides PCB assembly services. The company produces rigid PCBs, flex and rigid flex PCBs, HDI PCBs, microelectronics PCBs, aerospace and defense PCBs, controlled impedance PCBs, and RF and microwave PCBs. Services include PCB assembly, component sourcing and stocking, flying probe testing, and PCB design support.

Summarized from the company’s own website

Supplier designations

For Profit OrganizationManufacturer of GoodsWoman Owned BusinessWoman Owned Small Business

Self-certified by the company in its SAM.gov registration

Their plant

FacilityCityStateEmployeesStatus
Sierra Circuits, INC.SunnyvaleCA100–499 ACTIVE

Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.