End to End Position Sigma Four as an end-to-end contract manufacturing partner for custom cable assemblies, electrical harnesses, power supplies, and prototyping, with value-added and kitting services, capable of translating customer drawings, prints, samples, schematics, or verbal instructions into finished products.

Quality and Delivery Leverage ISO 9002 certification and a proven on-time delivery track record to target healthcare, medical device, electronics, and industrial OEMs seeking reliable, compliant manufacturing partners.

Global Local Model Our capability to work with both local and global manufacturers enables scalable supply options, quick ramp-ups for prototypes and small-to-mid-volume production, and simplified supplier management for regional and international programs.

Prototype to Production Sigma Four emphasizes prototyping and early development to help shorten time-to-market, supporting customers from drawings and schematics through sample assemblies to production-ready cables, harnesses, and assemblies.

Regional Proximity Based in Plano, Texas, Sigma Four offers regional proximity for the Dallas-Fort Worth area, enabling faster lead times, easier collaboration, and local support for OEMs with global supply needs.