Corrigan has expanded into a family of companies including Corrigan Oil, Corrigan Propane, Corrigan Construction, Corrigan Towing and Heavy Haul, Corrigan Transportation, Corrigan Mechanical Contractors, Corrigan Environmental Solutions, and Technical Environmental Services. The primary function of the Billing Clerk is to support the Corrigan Mechanical Contractors (CMC) team with multiple aspects in the office and with a focus on improving the efficiency of our customer billing processes.