MDU Construction Services Group is a subsidiary of MDU Resources Group, Inc. MDU Resources is headquartered in Bismarck, N.D. The company was founded in 1924 as a regional electric and natural gas utility company, operating on the plains of eastern Montana and western North Dakota. It has been publicly traded on the New York Stock Exchange since 1948 under the ticker symbol MDU.

MDU Construction Services Group Vision: With integrity, create superior shareholder value by expanding upon our expertise to be the supplier of choice in all our markets while being a safe and great place to work.

MDU Construction Services Group Mission: Utilizing existing expertise, safely provide value added products and services that exceed customer expectations.

CSG operates under four lines of business: Inside electrical, mechanical and fire suppression services; outside transmission and distribution, traffic and signalization; industrial turn-around services; and equipment manufacturing, rental and sales. The company has offices in 16 states and is licensed to do business in 43 states. CSG employs nearly 5,500 people.

Inside Electrical, Mechanical and Fire Suppression Services

• Bell Electric
• Bombard Electric
• Bombard Mechanical
• Desert Fire Protection
• Capital Electric Construction
• Oregon Electric
• ESI
• Midland Tech

Outside Transmission and Distribution, Traffic and Signalization

• Capital Electric Line Builders
• Hamlin Electric
• International Line Builders
• Lone Mountain Excavating & Utilities 
• Loy Clark Pipeline Company
• Pouk & Steinle
• Rocky Mountain Contractors

MDU Industrial Turn-Around Services

• USI Industrial Services
• Wagner Industrial Electric
• Frebco

Equipment Manufacturing, Rental and Sales