Minority owned Buisiness Home About Us Electronic Assemblies Medical Products Value Added Services Prototype Systems Contact Us Medical Products Sigma Four has expanded and we now provide design and manufacturing support to the medical industry. We have primarily helped our customers in selecting th...

Minority owned Buisiness Home About Us Electronic Assemblies Medical Products Value Added Services Prototype Systems Contact Us Welcome to Sigma Four Comments are closed. CONTACT US Tel: 972-423-6474 | Fax: 972-423-0648 3301 Technology Drive, Suite 115, Plano,Tx 75074 www.sigma4inc.com Home About Us...

Minority owned Buisiness Home About Us Electronic Assemblies Medical Products Value Added Services Prototype Systems Contact Us Electronic Assemblies Sigma Four is a full-service contract manufacturer with the experience and expertise needed to support you from design through production. We are conv...

Minority owned Buisiness Home About Us Electronic Assemblies Medical Products Value Added Services Prototype Systems Contact Us Prototype Systems Our Process: CUSTOMER SUPPLIES A PRELIMINARY DESIGN SIGMA FOUR TECHNICAL STAFF PROVIDES INPUT TO REFINE THE PRELIMINARY DESIGN. SIGMA FOUR MANUFACTURES A ...