About ESI


Supporting our communities

ESI supports the communities in which our employees live and work, through projects such as the renovation of the historic Meinken Field in Covington, Kentucky. ESI donated labor, installing all new electrical infrastructure for the field.

ESI Electrical Contractors

Founded in 1966, ESI Electrical Contractors, Inc. provides industry-leading electrical construction services across Ohio and the surrounding region. Our expertise in design/assist, estimating and preconstruction helps us exceed our customers’ expectations by safely completing projects on time and within budget. We have deep project experience in a variety of markets, including commercial, government, health care, education and sustainable construction.

Wagner Industrial Electric, a division of ESI located in Dayton, performs commercial and industrial electrical construction for a variety of customers, including automotive manufacturers and energy generation facilities.


ESI, along with its division, Wagner Industrial Electric, is a Voluntary Protection Program Star Mobile Workforce contractor, an achievement earned through the Occupational Safety and Health Administration in recognition of employers and employees who have achieved exemplary occupational safety and health.

Our parent company

ESI Electrical Contractors, Inc. was purchased by MDU Construction Services Group, Inc. in 2002. With authorization to work in 42 states and more than 6,700 skilled employees across the country, MDU Construction Services Group provides industry-leading construction services with a focus on safety.

CSG Location MapAs part of a construction services company with operations and crews across the nation, ESI has access to added resources and financial strength, as well as national buying power. We use these resources to secure the best pricing possible for our clients.

MDU Construction Services Group is part of MDU Resources Group, Inc., which provides essential products and services through two lines of business: regulated energy delivery and construction materials and services. The company has been traded on the New York Stock Exchange since 1948 under the symbol MDU.