When certified precision is non-negotiable — when exact specifications must be absolutely achieved or exceeded — these are the complex manufacturing challenges C4 Welding solves every day. C4 Welding, Inc., offers critical welding, manufacturing engineering, mechanical design, assembly, OEM manufacturing, and in-house fabrication services for specialized customer projects. We are home to a team of highly-experienced certified welders, weld inspectors, assemblers, and machinists. Our industrial roots extend back to our founding 35 years ago. Along the way, we have become nationally recognized as a leader in critical welding and fabrication services.