Outsource to OneSource

With our industry experience, SIX SIGMA methodology, and technical knowledge, OneSource cuts your costs by providing you assembly and manufacturing solutions. We perform a variety of solutions including control panel assembly, enclosure modifications, wire cutting, and product kitting. You will receive your finished assemblies just in time, allowing you to focus on your core competencies and satisfy your customers.


  • Our production division includes hundreds of services, such as terminating wires, building cable harnesses, and prefabricating cable and wire
  • We can build, wire and label control panels to UL508A certification
  • We also cut, build and add connectors for mechanical builds including power distributors (ponies) and power panels for 100 amp to 480 amp
  • Additionally, our assembly handles special packaging, custom labeling, and product kitting


  • We have the only Steinhauer ModCenter in Southern California
  • For back panels up to 92” by 94” we offer drilling, tapping and cutouts
  • We provide cutouts and holes on enclosures up to 93” tall by 86” wide