About Rocky Mountain Contractors


Rocky Mountain Contractors is a full-service contractor providing electric, gas and telecommunications construction expertise as well as engineering and design support. We have been providing construction and maintenance on a broad range of utility services since the 1960s.

Rocky Mountain Contractors is a local Montana company with offices in:

  • Belgrade, Billings, Great Falls, Helena, Kalispell and Missoula
  • Rapid City, South Dakota

We work primarily throughout the state of Montana, ​​but we also work in North Dakota and other Rocky Mountain states. We are licensed to work in the following states: California, Colorado, Idaho, Montana, Nebraska, Nevada, North Dakota, South Dakota, Texas, Utah, Wyoming and Washington.

Our highly trained workforce includes non-bargaining employees working alongside employees who are members of a collective bargaining agreement called for employment through IBEW Local Unions 44, 47, 426, 532, 768, 206, 714 and 1245.

Our Parent Company


In 2002, Rocky Mountain Contractors joined MDU Construction Services Group, Inc., an MDU Resources Group, Inc. company. As a subsidiary of MDU Construction Services Group, we have substantial financial backing from one of the most successful energy and construction services companies in the nation. This relationship also gives Rocky Mountain Contractors extraordinary buying power, allowing us to pass our savings on to our customers.

CSG Location MapWith more than 5,500 skilled employees and authorization to work in 43 states, MDU Construction Services Group provides industry-leading construction services with a focus on safety. The diverse group of companies specializes in constructing and maintaining electric and communications lines, gas pipelines, fire suppression systems, and external lighting and traffic signalization. The companies also provide expertise in utility excavation and inside electrical and mechanical services, and manufacture and distribute transmission line construction equipment and supplies.

MDU Construction Services Group is a subsidiary of MDU Resources Group, Inc., a major natural resources company that provides value-added natural resource products and related services that are essential to energy and transportation infrastructure.

MDU Resources was founded in 1924 as a small electric utility serving a handful of farm communities on the border of Montana and North Dakota. Today, MDU Resources is a multibillion-dollar corporation with most of its businesses headquartered in Bismarck, N.D., but operations and customers across the country. The company’s stock has been traded on the New York Stock Exchange since 1948 under the symbol MDU.

Supporting Our Communities


Rocky Mountain Contractors strives to be a partner with the communities in which we live and work.

Our employees support their communities in a variety of ways, including hanging holiday lights for their cities, installing veterans’ cemetery flag poles and raising funds for local charities.