Sierra Circuits, Inc.
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Serving over 20,000 PCB Designers
and Engineers since 1986.

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Customer Testimonials
Please convey to all the Sierra Proto Express team our thanks for a job well done. We received the boards as promised and they are now in use in our production test areas.
Earl B.
Engineer,
Project Administrator
Siemens Medical Solutions
The boards arrived yesterday and they look great. I am very happy with the quality of these boards. Thank you so much for your diligence and attending to our order. I do appreciate the great service and value you provided to us.

It is a pleasure to work with such nice, courteous, and helpful people as yourselves. I hope to do business again with you soon.
Jonathan W.
Principal Engineer,
Northrop-Grumman
Annapolis, MD
www.northropgrumman.com
Sierra Proto Express has been consistent with great level of service, product quality, timely delivery of PCBs, and timely responses to all questions.
Jose C.
Engineer,
Apple, Inc.
Cupertino, CA
www.apple.com
Sierra Circuits is an exemplary testament to excellent customer service. Thanks so much for the circuit boards. You really helped us out of a jam!
Mike Hamel
Sr. RF Engineer
MicroStrain, Inc.
Williston, VT
I wanted to take the time to thank you for all your hard work and effort towards producing so many boards this year. I have been amazed at the level of service you and everyone else at Sierra have provided. I have had 95% of all my boards produced through Sierra because of the high production quality and the attention to customer's needs. I look forward to continue working with you and I keep recommending Sierra to anyone needing PCB services.

Thank you for everything!
Jonathon H.
Systems Engineer,
Radiance Technologies
Huntsville, AL
Thanks for the great work on the boards! Your company is at the top of my list for future work.
Matt L.
Lexmark
www.lexmark.com
Just received the boards -- you guys rule!! Thanks for making it happen so quickly.
Adam R.
MindTribe. Engineering Moxie.
Palo Alto, CA
www.mindtribe.com
Just got the boards in my office. They look great! To you and your team a hearty thank you!
Ryan S.
Electronics Group,
Battelle Science & Technology International
www.battelle.org
..I enjoyed meeting you and viewing your presentation at the PCB Design show. I think your Micro-Electronics division is leading edge technology in the PCB industry. My connection with Sierra Proto Express goes back many years, spanning several companies. Your quotes have always been right on target and shipments have always been on time with exceptional end product quality. No matter what company I have worked with,regardless of business model, I always find a spot for Sierra Proto Express that fits my company's requirements. Thanks.
Tony C.
Printed Circuit Design Engineer
Tekelec Inc.
www.tekelec.com
...we don't even send our Request For Quotes to any other company! Why would we?... Sierra Proto Express ROCKS!
Andrew Z.
PCB Designer
Mortara Instrument, Inc.
www.mortara.com
...this is the second time Sierra Proto Express has worked with us on a critical project. I wanted to express my deepest appreciation to the staff your company. I am a 100% satisfied customer and I have come to believe that your company is an icon of quality, professionalism, dedication and friendliness.
Syed H.
Vice President
EnviroSoft, Inc.
Houston, TX
...this is the second time Sierra Proto Express has worked with us on a critical project. I wanted to express my deepest appreciation to the staff your company. I am a 100% satisfied customer and I have come to believe that your company is an icon of quality, professionalism, dedication and friendliness.
Michael K.
Principal Engineer
Telegent Systems
Sunnyvale, CA
The boards are here and in the hands of the people who need them. Good job by Sierra! That's the kind of service customers appreciate.
Tom F.
Design Engineer
Transition Network Inc.
Eden Prairie, MN
You know - you are one of my favorite suppliers.. You help us through so many jams! Thanks for getting this order done so quickly.
Kathy W.
Buyer
Lockheed Martin Inc.
Thanks to you all for your diligent and expedient help! You all make an awesome team.
Lesley H.
GDI Communications
Wanted to let you know that quality and delivery over the past several months has been very good. Quality has been 100%. Delivery at 100 or 99%. Good job and thank you!
James B.
Buyer
Rockwell Automation
I must say your customer service is beyond excellent! You have always gotten right back to me as soon as I call you and are super to work with due to your positive attitude. Thanks for saving our company money and delivering on time.
Anne M.
Luxtera, Inc.
Carlsbad, CA
www.luxtera.com
..we have two senior executives here, both VPs, who once were associated with the board building process. When they heard how fast Sierra can turn out boards with the quality that Sierra has, they were amazed and a little disbelieving at first. They have never seen such good quality come with such quick turn around time. Kudos to the Sierra Proto team!
Kenny V.
Senior Project Manager
SUMMA Technology, Inc.
www.summa.com
Great job. First time I've used Sierra Proto Express. Silk screen was incredible, the smallest text was readable. Thru-hole drills where dead center. Solder mask, perfect. Nothing else I can say, just perfect, very perfect. I'll be using your company from now on.
Mike S.
Pike Aerospace Research
Ontario, Canada
..you guys are a 1st class company and great to work with.
Randy D.
Keiser, Inc.
www.keiser.com
The PCBs have arrived right on time and look great. Thank you for your continued excellence in service and product!
Matthew P.
Product Design Engineer
Celadon Systems, Inc.
Burnsville, MN
Thanks for all your help. I'm very impressed with the boards and how quickly they were turned!
Jason R.
Advanced ICs and Sensors
United States Navy
The new no-touch process worked very well and the boards look great as always. Thanks for improving your already-excellent service.
Paul Z.www.aep.com
.. the boards we received were excellent quality and workmanship. Let the crew know they did a fantastic job!
Robert P.
Research Engineer
Science Research Labs, Inc.
Somerville, MA
I just wanted to say thank you so very much for your help on the PCB order. We have the boards and are extremely happy with them.
John F.
President
Old Dominion PCB Design Inc.
Woodbridge, VA
..Thanks for all of your help. You have great engineers. They were on phone with me constantly until I fixed all design/manufacturability issues. I really do appreciate the service.
Zubin L.
NXP Semiconductors (formerly, Phillips Electronics)
San Jose, CA
www.nxp.com
I want to extend our gratitude to Sierra for delivering our PCBs on time with the quality we have grown to expect. This was a critical situation for our customer, and due to your commitment and the follow through, we were able to successfully deliver product to them yesterday. Thank you for being a reliable partner.
Rick B.
VP Engineering,
AVID Technologies
Twinsburg, OH
I have found Sierra Circuits to be EXTREMELY supportive in resolving any issues in our PCB/Assembly. I feel they have consistently met me more than half way, which makes my job easier.
Paul M.
PerkinElmer
Miamisburg, OH
www.perkinelmer.com
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