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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
US patents9
SAM.gov UEIECTJB433GHK9
CAGE code0ZHS4
Incorporated inCA
LEI5493000LBL7BS4M2GR93
LISTED ON FACTORYREGISTRY100%SOURCE COVERAGE
Named on the company’s own website, read JUL 29, 2026

Open positions

Openings read from Sierra Circuits, INC.’s own job board on ADP, last checked OCT 26, 2026. FactoryRegistry does not host applications — each title opens the posting where the company published it.

41 more on the company’s board

Supplier designations

For Profit OrganizationManufacturer of GoodsWoman Owned BusinessWoman Owned Small Business

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

Patents

9 US patents granted 2016–2019, none of them in the five years to SEP 2025.

Audio-visual technology 7Surface technology, coating 1Semiconductors 1

Newest 5 shown · Granted to Sierra Circuits, Inc. · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0

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.