Innovation is the true spirit of Sierra Circuits.
And the ever-changing demands of the PCB industry continue to fuel this spirit today.
Back in the mid 1980’s, while other manufacturers were simply fabricating circuit boards, Sierra Circuits was constantly reinventing itself while pushing the envelope to help revolutionize the PCB industry. As a family-run business, the idea of establishing quicker cycle times was born out of the existing industry inefficiencies.
Specializing in quick turn PCBs and medium production runs, Sierra’s primary focus is delivering the highest quality product in the shortest amount of time. What makes this possible is that Sierra is the actual manufacturer and assembler of PCBs. By owning our manufacturing and assembly facilities, we control every aspect of the production schedule.
Above all, Sierra Circuits’ creed is to provide customers with resources, knowledge and the highest quality circuit boards the industry has to offer.

Partner with your vendor early and get a tour!
We love visitors. Come take a personal tour of our facilities and have all your manufacturing and design questions answered by one of our PCB experts.
Request a tour online or call us at (408) 735-7137.
The People Who Built Sierra Circuits

The Dreamer
Ken Bahl
CEO
Ken is the consummate optimist with a passion for solution-driven technology and impeccable standards. His love for family and strong company culture is reflected in the integrity of his product.

The Rock
Bala Bahl
Co-founder/Vice President
Bala is the backbone of Sierra Circuits. Her unrelenting determination to get things done makes her a perfect counterbalance to her husband’s visionary ideals.

The Muscle
Nilesh Parate
General Manager
Nilesh is in charge of product strategy and operations for rapid PCB manufacturing & assembly service sold through online channels.

The Asset
Steve Arobio
VP of Manufacturing Operations
Steve’s knowledge and experience keeps our customers way out in front of the others in their industry.
Certifications
Sierra Circuits, Inc. (dba Sierra Proto Express) has been a premier manufacturer of prototype PCBs since 1986. We believe that repeat business from our customers best illustrates our high standards and commitment to excellence. That is the metric we are most proud of and what we measure ourselves by.
Of course, we also have stellar industry certifications, some of which are shown below:
- ISO 9001:2015 Certificate
- ISO 13485:2016 Certificate
- UL Certified
- IPC-A-600 Inspectors
- Defense Logistics Agency (DLA) Approval Letter
- IPC Manufacturers Qualification Profile (MQP) for Sierra Circuits, Sunnyvale, California
- ITAR Registration Letter
- Minority Business Certification
- MIL-PRF-31032 Certificate
- Mil-PRF-55110 Certificate for GF Materials
- Mil-PRF-55110 Certificate for GI Materials
- RoHS / REACH Compliance Material Composition Declaration
- Conflict Minerals Reporting Template









Fun Facts

Sky’s the Limit
One of our boards is on display at the National Air and Space Museum in Washington D.C.
Built Sierra Tough
One of our cubesat boards not only survived a rocket explosion, but was the only thing that was left undamaged.
Humble Beginnings
Sierra Circuits loves and encourages growth within the family. In fact, our very own director of sales and marketing used to sweep the floor in the drilling facility.
The PCB Pup
The unofficial mascot of Sierra Circuits is none other than Jaeger, a handsome terrier mix that is as steadfast and loyal as the company he represents!