Insights

Global Certifications Sierra Circuits holds ITAR, AS9100D, ISO-9001, ISO 13485, and MIL-55110/31032 certifications, indicating strong quality, compliance, and suitability for defense, aerospace, medical, and regulated industries—identify target sectors that require these standards.

Turnkey Capabilities Offers end-to-end PCB services from layout and design to manufacturing and assembly with a single point of support, presenting upsell opportunities to existing customers and potential clients seeking streamlined procurement and reduced vendor coordination.

HDI Expertise Specialization in High-Density Interconnect technology and QuickTurn HDI PCBs positions Sierra Circuits for customers with complex, high-precision designs—proactively target designers and OEMs in aerospace, automotive, medical devices, and robotics.

Growing Demand Revenue range and a multi-decade track record, plus a focus on online ordering and education tools (Turnkey Pro, Trace Width Calculator, informative website), suggest opportunities to expand digital sales, self-service, and online configurators for faster quote-to-order cycles.

Diverse Customer Base With 20,000+ customers since 1986 and a family-run, minority and women-owned profile, there is potential to initiate programs targeting small to mid-size designers, startups, and contract manufacturers seeking certified suppliers with strong reliability and inclusive procurement narratives.

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Sierra Circuits Tech Stack

Sierra Circuits uses 8 technology products and services including Crazy Egg, Fullstory, AutoCAD, and more. Explore Sierra Circuits's tech stack below.

Sierra Circuits's Email Address Formats

Sierra Circuits uses at least 4 email formats:
Sierra Circuits Email FormatsExamplePercentage
FirstL@protoexpress.comJohnD@protoexpress.com
86%
FirstLast@protoexpress.comJohnDoe@protoexpress.com
7%
F.Last@protoexpress.comJ.Doe@protoexpress.com
4%
FLast@protoexpress.comJDoe@protoexpress.com
3%

Frequently Asked Questions

What is Sierra Circuits's phone number?

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You can contact Sierra Circuits's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Sierra Circuits's official website and social media links?

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Sierra Circuits's official website is protoexpress.com and has social profiles on LinkedIn.

How much revenue does Sierra Circuits generate?

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As of August 2026, Sierra Circuits's annual revenue is estimated to be $10M - $25M.

What is Sierra Circuits's NAICS code?

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Sierra Circuits's NAICS code is 334 - Computer and Electronic Product Manufacturing.

How many employees does Sierra Circuits have currently?

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As of August 2026, Sierra Circuits has approximately 487 employees across 4 continents, including North America, Asia and Europe. Key team members include Chief Executive Officer: K. B., Head Of Training: K. M. and Head Business Development,India: V. K. Explore Sierra Circuits's employee directory with LeadIQ.

What industry does Sierra Circuits belong to?

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Sierra Circuits operates in the Computers and Electronics Manufacturing industry.

What technology does Sierra Circuits use?

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Sierra Circuits's tech stack includes Crazy Egg, Fullstory, AutoCAD, WordPress, SAP, Shopify, ADP and DocuSign.

What is Sierra Circuits's email format?

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Sierra Circuits's email format typically follows the pattern of FirstL@protoexpress.com. Find more Sierra Circuits email formats with LeadIQ.

When was Sierra Circuits founded?

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Sierra Circuits was founded in 1986.
Sierra Circuits logo

Sierra Circuits

Computers and Electronics ManufacturingCalifornia, United States201-500 Employees

Sierra Circuits, based in Sunnyvale, California, operates in the computers and electronics manufacturing industry, with a focus on PCB manufacturing and assembly and High-Density Interconnect technology. The company provides end-to-end PCB production services, covering design, layout, assembly, and manufacturing, with a single point of contact for customers. Founded in 1986, Sierra Circuits has served more than 20,000 customers and employs between 201 and 500 people. It holds ISO 9001:2008, ISO 13485:2003, and Mil-Spec MIL-P-55110 certifications. The business is described as family-run and minority and women-owned. Its address is 1108 West Evelyn Avenue, Sunnyvale, CA 94086, United States, and its website is https://protoexpress.com.

Section iconCompany Overview

Phone number
NAICS Code
334 - Computer and Electronic Product Manufacturing
Founded
1986
Employees
201-500

Section iconFunding & Financials

  • $10M - $25M

    Sierra Circuits's revenue is estimated to be in the range of $10M - $25M

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