MDU Construction Services Group specializes providing electrical line, pipeline construction, inside electrical wiring, cabling and mechanical services. Established in 1924 the company offers a range of fire suppression, outside transmission, distribution and signalization services. MDU Construction Services Group maintains a network of several offices on more than 15 United States. The company has a work force of over 5,500 employees. MDU Construction Services Group s clients include Bell Electric, Bombard Electric, Bombard Mechanical Desert Fire Protection, Capital Electric Construction and Oregon Electric. The company equipment manufacturing, renting and selling services. MDU Construction Services Group is a subsidiary of MDU Resources, which builds and maintains homes, factories, offices and stores.