About Us

IN 1998, OEG expanded into the low-voltage systems arena by forming Integrated Systems Group. ISG is a company within OEG, Inc. that provides low-voltage design and installation services for nurse call, voice-data systems, AV, security access, and fire life safety systems.

Our client’s markets include, but are not limited to, health care, commercial, government, institutional, educational, and high-tech.

We are pleased to be known as both a contractor of choice for our clients, as well as an employer of choice for our employees. The majority of our technicians have been with us for over five years and are among the best in their fields.

All members of the Integrated Systems Group team have adopted and participate in a culture that promotes the highest quality workmanship, exceeding our customer’s expectations and working in a manner that protects the safety and security of our customers, as well as that of our employees.

Our reputation for the highest quality installations has earned us top-tier status with nearly all major structured cabling system manufacturers and audio-visual manufacturers, as well as the opportunity to represent Rauland Nurse Call systems in this area.

Our partnership with our parent company, MDU Resources, has allowed us the ability to insure and bond virtually any project and to own and maintain the latest state-of-the-art test equipment.

With over 500 employees based out of our Portland office, including fifty low-voltage technicians and thirty low-voltage service vehicles in the Portland Metro area, we are able to support multiple clients and locations.

Our team is equipped with the skills, tools, resources, and management to ensure that your project will be accomplished safely, on time, on budget, and to your satisfaction.


Integrated Systems Group is part of MDU Construction Services Group, Inc. With more than 5,000 skilled employees across the country and authorization to work in 45 states, MDU Construction Services Group provides industry-leading construction services. Our diverse group of companies constructs and maintains electric and communications lines, gas pipelines, fire suppression systems, and external lighting and traffic signalization. In addition, we provide expertise in utility excavation, 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. They provide value-added natural resource products and related services that are essential to energy and transportation infrastructure.

MDU Resources got its start as a small electric utility company in 1924. They have grown into a multi-billion dollar company whose diverse holdings, growth strategy and commitment to integrity have allowed it to consistently post strong earnings and earn the reputation of providing superior shareholder value. The company is headquartered in Bismarck, North Dakota, and has been traded on the New York Stock Exchange since 1948 under the symbol MDU.