MDU Construction Services Group provides industry-leading construction services with a focus on safety.

We build powerlines and substations. We excavate, drill and build underground infrastructure. We build infrastructure to bring electricity into buildings and distribute it throughout them, powering data centers, hospitals, commercial buildings, universities and research facilities.

We design, build and install heating, cooling, plumbing and fire suppression systems. We design, manufacture and distribute equipment to build transmission lines. We maintain refineries, build solar power systems and light bridges, streets and sports arenas.

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Critical success factors

Safety first

Provide an industry-leading safe and healthy work environment.

Customer satisfaction

Dedicate ourselves to understanding and fulfilling our customers’ needs, becoming the preferred provider for services provided.

Financial success

Enhance total shareholder value by improving earnings and returns on invested capital while delivering the best construction value to our customers.

Employee engagement

Attract, develop, appropriately train, reward and retain a superior workforce.

ET&D Partnership logo

ET&D Partnership

MDU Construction Services Group is a member of the Electrical Transmission & Distribution Partnership, a nationwide collaboration with OSHA dedicated to reducing injuries and fatalities in the line construction industry. Many of our employees are active participants on the Partnership’s committees and task teams.

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What sets us apart

  • Innovation. Our employees bring innovation to the table through their intellectual capital, experience and expertise, ensuring quality and value for our customers.
  • Collaboration. Our teams work together to deliver projects for nationwide customers in numerous markets. With 60+ locations across the country, we can meet our clients’ needs wherever they may be.
  • Integrated project delivery. Our operating companies regularly collaborate on projects, tapping into each other’s talents and expertise to exceed our customers’ expectations.
  • Financial strength. Thanks to MDU Construction Services Group’s size and financial stability, we realize reduced rates for bonding, insurance and financing. These efficiencies, combined with reduced equipment costs through supplier alliances, result in savings for our customers.
  • Quality. Our companies attract and retain a highly skilled workforce dedicated to providing a quality product, thanks to our commitment to training, safety and integrity. A highly skilled, safe and dedicated workforce ensures superior results for our customers.

Our parent company: MDU Resources Group, Inc.

MDU Construction Services Group is a subsidiary of MDU Resources Group, Inc. MDU Resources Group provides essential products and services through two lines of business: regulated energy delivery and construction materials and services.

MDU Resources is a Fortune 1000 company with operations, customers and employees across the country. The company was founded in 1924 as a small electric utility serving a handful of farm communities on the border of Montana and North Dakota. The company realized early the value of delivering a variety of services and grew by developing businesses around its expertise.

MDU Resources’ stock has traded since 1948 under the symbol MDU on the New York Stock Exchange.

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Historical timeline


Wagner-Smith Equipment Co., as it is known today, got its start in 1917 as The Charles M. Kelso Company.


MDU Construction Services Group’s parent company was founded in 1924 as a small electric utility serving a handful of farm communities on the border of Montana and North Dakota.


Major league baseball played its first night game at Cincinnati’s Crosley Field. Wagner-Smith, today part of MDU Construction Services Group, installed the stadium lights. President Franklin Roosevelt flipped the switch to turn on the lights by remote from the White House.


Oregon Electric Group, now known as O​EG, Inc., in Portland, Oregon, is founded. Today, it is one of the largest electrical contracting companies in the Northwest.


Loy Clark Pipeline Co. is founded. It was the first pipeline construction company in Oregon and had just 12 employees. Capital Electric Construction Co. is also founded in 1957 in Kansas City, Missouri.


E.S.I., Inc., is founded in Ohio.


Capital Electric Line Builders in Riverside, Missouri, is founded.


Bell Electrical Contractors in St. Louis is founded.


Desert Fire Protection is founded in Las Vegas.


Bombard Electric is founded in Las Vegas.


International Line Builders is founded. Today, the company has locations in Oregon, Washington, Idaho and California.


Our parent company realigns and changes its name to MDU Resources Group.


MDU Resources Group forms a new construction services division, today known as MDU Construction Services Group, with the acquisition of two electric services companies in Portland, Oregon.


Capital Electric, Bell Electrical and ​O​EG join MDU Construction Services Group.


Bombard Mechanical is founded in Las Vegas.


MDU Construction Services Group joins the Electrical Transmission & Distribution Partnership as a founding member.


The company enters the Las Vegas market with the acquisition of Bombard Electric and Bombard Mechanical.


Wagner Industrial Electric, Inc. is formed in May 2006 by merging the industrial electric divisions of two long-standing electrical contractors, Capital Electric Construction Company in Kansas City, Missouri, and The Wagner-Smith Company in Dayton, Ohio.


MDU Construction Services Group acquires Lone Mountain Excavation & Utilities in Las Vegas.


Capital Electric Construction keeps the lights on for the Chiefs, doing the Arrowhead Stadium renovation in Kansas City, Missouri.


Bombard Renewable Energy is named the 13th largest solar contractor in the country, according to Solar Power World’s Top 100 list.


MDU Construction Services Group is ranked No. 11 on the Top 600 specialty contractors list in the United States.


Several MDU Construction Services Group companies in Las Vegas take part in the construction of the LINQ entertainment district, including the High Roller, the tallest observation wheel in the world.


Capital Electric Line Builders completes the biggest transmission line construction project in MDU Construction Services Group history: a 345-kV, double-circuit line stretching 108 miles across Kansas.


MDU Construction Services Group moves up to No. 10 on ENR’s Top 600 Specialty Contractors list.


MDU Construction Services Group ranks No. 8 on ENR’s Top 600 Specialty Contractors list.​


Bombard Renewable Energy, a division of Bombard Electric LLC, ranks 26th out of 500 solar companies in the U.S., per Solar Power World magazine.


MDU Construction Services Group ranks No. 13 on ENR’s Top 600 Specialty Contractors list.​


MDU Construction Services Group ranks No. 11 on ENR’s Top 600 Specialty Contractors list.​


Bombard Renewable Energy ranked No. 13 on Solar Power World’s 2018 Top Solar Contractors list.


MDU Resources Group acquires the assets of Pride Electric in Redmond, Washington.


Wagner Industrial Electric becomes a division of ESI, Inc.


MDU Construction Services Group ranks No. 12 on ENR’s Top 600 Specialty Contractors list. and No. 6 on EC&M's Top 50 Electrical Contractors list.


MDU Resources Group acquires the ​stock of PerLectric, Inc., in Fairfax, Virginia.


MDU CSG moves up to No. 11 on ENR's 2020 Top 600 Specialty Contractors list and No. 4 on EC&M's 2020 Top 50 Electrical Contractors list.


MDU Construction Services Group reveals a new logo.


MDU CSG ranks No. 10 on the ENR 2021 Top 600 Specialty Contractors list and No. 4 on the EC&M 2021 Top 50 Electrical Contractors list.


MDU CSG ranks No. 12 on the ENR 2022 Top 600 Specialty Contractors list and No. 5 on the EC&M 2022 Top 50 Electrical Contractors list.