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ColliSys maintains a professional affiliation with several unions and associations. We utilize their expertise for safety and professional training, uphold their apprenticeship and worker standards, and honor their business ethics programs. Our
Natural Gas Partners is one of the leading companies in the Energy and Utilities sector.
H&S Electric Inc is a San Fernando, CA-based company in the Energy and Utilities sector.
Sioux Valley Energy is a Colman, SD-based company in the Energy and Utilities sector.
GeoCorr is a Houston, TX-based company in the Energy and Utilities sector.