About Us

Trusted US Manufacturer with a passion for Quality

Welcome To Sigma Four

Sigma Four is a manufacturer of Custom Cable, Wire Harness and electronic assemblies located in Plano, Texas since 1984.

Sigma Four is a trusted manufacturer of custom cable, wire harness and electronic assemblies headquartered in Plano, Texas. Since 1984, we have taken pride in our high-quality work and enduring relationships within our industry.  For over three decades we have taken pride in our highest standards of quality and our dedication to working closely with our customers. We are an AS9100D and ISO9001 certified and ITAR Registered Company.  In 2024 we were awarded “Commitment to Quality Excellence” by TMAC. Most of all we are a local company that is a phone call, or an in-person visit away to meet your design requirements. We strive to make the quote process painless and personal.  Email us your specifications and let us get started with working with you.

Our Mission

To exceed our customers’ expectations in quality, on-time delivery, through continuous improvement and personalized customer interaction.

Our vision

We at Sigma Four strive to be your go-to custom cable manufacturer in the United States. Our Vision extends to maintaining our deep relationships with our customers and our ongoing efforts to keep manufacturing local.

Our commitment

We are committed to building and maintaining our relationships with our customers. You can meet with our engineers and production leads and have robust discussions about requirements, design changes, or even discuss near-term and long-term supply chain needs. We are your local team who are happy to have you come on-site and build a long-lasting relationship.

why choose us

We are always ready to meet your changing demands
We are ready to deliver to the highest quality standards
We are focused on our customers and building lasting relationships

Sigma Four is a team committed to excellence. Our number one goal is customer satisfaction. We are proud of our ongoing dedication to meet our goal!

US Manufacturer

We are a contract manufacturer who takes pride in being a US based company. We have always believed that our customers take comfort knowing we are accessible to them with minimal effort.

Flexibility

Our ability to provide production volumes or prototype quantities has helped us partner with our customers and support their growth

DIVERSITY

We are a minority owned small business and MBE certified. We are proud of our diversity within our company and the world we represent

QUALITY

Over the years our Quality and dedication to our customers have not wavered and our dedicated employees are part of our founding philosophies

Our Location

US Office

3301 Technology Drive Suite #115 Plano, Texas 75074 USA
 
 
Office Hours: 8:00am CST - 5:00pm CST