Barker Plumbing

Established in 1914, Sjostrom & Sons specializes in a range of general contracting and construction management solutions. The company offers specialty construction and design and build services for buildings, highways, bridges and other civil projects. It is one of the largest, self-performing contractors in northern Illinois. Sjostrom & Sons provides underground pipework solutions for storm sewers, sanitation systems and water lines. In addition, the company has expertise in the fields of masonry, concrete paving, structural work, and rough and finish carpentry. Its clients include schools, churches, hospitals, corporate offices and government buildings. Sjostrom & Sons undertakes projects for the construction and rehabilitation of parking lots and foundations.

In operation since 1919, Nelson Piping Company is a mechanical contractor. It operates more than two divisions. The company operates Nelson Carlson Mechanical Contractors division, which provides a range of piping services. Nelson Piping Company offers plumbing, piping fabrication, welding, backflow survey and inspection, underground tank removal and ground water remediation services. It offers installation services for snow melting, steam and hot water, thermal storage, heating and air conditioning, and power, process, food grade and pharmaceutical piping systems. The company also operates Nelson Fire Protection division, which provides various design and remodeling services for buildings. It offers flow, leak, fire pump and damage testing services. The company additionally operates Master Sheet Metal Contractors division, which provides interior fiber-optic inspection, air balancing and smog removal services.