Insights

Global Certifications Sierra Circuits is ITAR, AS9100D, ISO-9001, ISO 13485, and MIL-55110/31032 certified, signaling strong quality and compliance credentials that can be leveraged to win contracts requiring stringent standards across aerospace, medical devices, and defense sectors.

One-StopPCB Partner Position Sierra Circuits as a single-source provider covering PCB design, layout, manufacturing, and assembly, reducing vendor management for engineers and procurement teams and enabling faster time-to-market.

HDI Expertise Emphasize High-Density Interconnect capabilities and Turnkey Pro online ordering to attract high-mix, high-complexity PCB programs, including rapid prototyping and turnkey workflow for quick iterations.

Growth & Scale With 201-500 employees and a revenue range of 10–25M, target mid-market electronics firms seeking credible manufacturing partners with established quality processes and scalable capacity.

Educative Value Leverage educational resources and design tools (Trace Width Calculator, design tips, informative website) to capture early engagement from PCB designers and engineers, turning them into long-term customers through ongoing guidance and support.

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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.

Crazy Egg
Analytics
Fullstory
Analytics
AutoCAD
Cad & Graphics
WordPress
Content Management System
SAP
Customer Relationship Management
Shopify
E-commerce
ADP
Human Resource Management System
DocuSign
Miscellaneous

Media & News

Sierra Circuits's Email Address Formats

Sierra Circuits uses at least 4 email formats:

Sierra Circuits Email Formats	Example	Percentage
FirstL@protoexpress.com	JohnD@protoexpress.com	86%
FirstLast@protoexpress.com	JohnDoe@protoexpress.com	7%
F.Last@protoexpress.com	J.Doe@protoexpress.com	4%
FLast@protoexpress.com	JDoe@protoexpress.com	3%

Frequently Asked Questions

What is Sierra Circuits's phone number?

You can contact Sierra Circuits's main corporate office by phone at

+1-408-735-****

. 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?

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

How much revenue does Sierra Circuits generate?

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

What is Sierra Circuits's NAICS code?

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

How many employees does Sierra Circuits have currently?

As of October 2026, Sierra Circuits has approximately 490 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 Editor In Chief: M. Y. Explore Sierra Circuits's employee directory with LeadIQ.

What industry does Sierra Circuits belong to?

Sierra Circuits operates in the Computers and Electronics Manufacturing industry.

What technology does Sierra Circuits use?

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

What is Sierra Circuits's email format?

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?

Sierra Circuits was founded in 1986.

Sierra Circuits

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

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

Q: How many employees does Sierra Circuits have currently?

Sierra Circuits has approximately 490 employees.

Q: What technology does Sierra Circuits use?

Sierra Circuits's tech stack includes reCAPTCHA, Indeed, SAP Global Trade Services, Linkedin Insight Tag, UNIX.

Q: What is Sierra Circuits's NAICS code?

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

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.