Circuit Assembly Logo Celebrating 50 Years
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Roger Lang and his brother Kermit Lang started Circuit Assembly over 50 years ago with one goal in mind – to design and manufacture connectors. The Lang brothers spent the next 10-15 years in the Irvine, CA area perfecting their craft and branching out into custom cable assemblies.

As our company saw continued success throughout the 90s, we were able to grow our team here in Irvine as well as open our manufacturing plant in China in 1999. Having a team in China allowed us to take on more complex orders, as well as offer increased flexibility in pricing for our clients.

Throughout all of our growth and development, the team at Circuit Assembly has never forgotten our family roots and this continues to extend to team members at all locations as well as to our customers. Most of our employees here in Irvine have been with us for a minimum of 7 years and all work with the same goal in mind – to treat our customers like family and work hard to create the best possible product for each of them.



At Circuit Assembly, we pride ourselves on working closely with our customers to create the exact product they need. We are problem solvers and we are constantly looking for ways to help fill a void or improve on an already existing product.

We accomplish this through listening to customers, learning their individual needs, and working with our team to provide options, ideas, and answers when our customers need them the most – quickly.

We understand that in a fast paced world, our customers often do not have time to wait for a lengthy development process. Our local US presence as well as our international factory in China allows us to work with our customers to create high quality products at low cost without jumping through hoops. This creates a system where orders can be produced quickly and consistently every time.


Circuit Assembly has been in business since 1969 and we don’t plan on going anywhere anytime soon. Our team is filled with experts who have extensive knowledge and experience, so we are always able and willing to help solve our customers’ individual problems.

We have resources both locally in California and overseas in China, as well as relationships with both large and small vendors. This allows us to offer our customers flexibility in pricing, terms, and delivery options.

We also understand that sometimes ideas must be tested before they are put into production. We work with many different customers who need prototypes built before they enter mass production or customers with small lot sizes or specialized production runs to create samples or small batches of products. We want your ideas to work just as much as you do, so we work with our customers to make sure their sample or prototype is engineered correctly.

Every one of our customers is a part of our family. We go above and beyond to brainstorm ideas, solve problems and work with each individual customer to create the product they need. Our customers know that when they call us, they won’t need to wait on a lengthy process; we are open, transparent, and ready to work with them to get the job done each and every time.

If you have a problem that needs to be solved, a product that needs to be created, or just have some questions about what we do and how we can help you, reach out to us today! We are excited to have you on board.

50th seal