Operating signal within 12 months from two or more independent sources.
What they make
Printed Circuit Assembly (Electronic Assembly) Manufacturing334418Sierra Assembly manufactures and assembles printed circuit boards (PCBs) in California, offering services including PCB fabrication, assembly, testing, and inspection across multiple PCB types such as rigid flex, HDI, ceramic, flexible, and multilayer boards. The company serves industries including aerospace and satellite, defense, medical, telecommunications, automotive, consumer electronics, industrial electronics, and others. The company performs processes including SMT assembly, through-hole assembly, conformal coating, X-ray inspection, in-circuit testing, and box build assembly.
SUMMARIZED FROM THE COMPANY’S OWN WEBSITE
Products
Where these came from
CERTIFICATIONS — LISTED ON THE COMPANY’S WEBSITE
- AS9100
- ISO 9001
- RoHS
Read from this company’s own website on August 9, 2026. Nobody at the facility has confirmed it here, and FactoryRegistry has not verified these — unlike operating status, which comes from independent public records. A certificate can lapse without the website changing, so ask the facility for current ones.
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| CMI Holdings, LLC | Chino | Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing 334416 | UNVERIFIED | 1.3 KM |
| A.w.i. Industries (u.s.a.) INC. | Chino | Glass Product Manufacturing Made of Purchased Glass 327215 | ACTIVE | 1.3 KM |
| General Photonics CORP | Chino | Electronic Connector Manufacturing 334417 | ACTIVE | 1.3 KM |
| Pioneer Electronic Technical C | Chino | Other Electronic Component Manufacturing 334419 | UNVERIFIED | 2.4 KM |
| Sterling Design | Chino Hills | Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511 | LIKELY ACTIVE | 2.6 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 2 FEDERAL SOURCES, 8 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| COMPANY SITE | OPERATING | JUL 2026 | JUL 2026 |
| SAM GOV | OPERATING | SEP 2025 | SEP 2025 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | SAM GOV | SEP 2025 |
| CAGE CODE | SAM GOV | SEP 2025 |
| CITY | SAM GOV | SEP 2025 |
| GEOM | CENSUS GEOCODER | JUL 2026 |
| NAME | SAM GOV | SEP 2025 |
| REGISTRATION EXPIRATION | SAM GOV | SEP 2025 |
| STATE | SAM GOV | SEP 2025 |
| WEBSITE | SAM GOV | SEP 2025 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.