Interstate Engineering Celebrates 50 Years Of Business

Founded in 1976, the engineering firm has grown to serve communities across 5 states.

Published on Mar. 4, 2026

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Interstate Engineering, an engineering, surveying, planning, and landscape architecture firm founded in Jamestown, North Dakota in 1976, is celebrating its 50th anniversary. The company has grown from 5 founding partners to nearly 200 employee-owners across 19 offices in 5 states, guided by a mission of integrity, quality, and loyalty in serving rural communities, urban centers, water districts, tribal lands, and private developers.

Why it matters

Interstate Engineering's 50-year milestone demonstrates the longevity and resilience of a values-driven, employee-owned professional services firm that has adapted to serve the evolving infrastructure needs of the Great Plains region over multiple generations. The company's growth and community-focused approach provide a model for other small and mid-sized engineering and design firms.

The details

Interstate Engineering was founded in 1976 by 5 partners with a shared mission to deliver necessary improvements to cities and counties across North Dakota. Starting in Jamestown, the company's name reflected an early vision to expand beyond the local community and serve a broader region. Over the decades, Interstate Engineering has grown into a multi-state firm with nearly 200 employee-owners across 19 offices in Minnesota, Montana, North Dakota, South Dakota, and Wyoming. As an employee-owned company, Interstate Engineering fosters a culture of ownership, accountability, and shared success, enabling it to deliver customized solutions efficiently for projects of all sizes.

Interstate Engineering was founded in 1976.
The company is celebrating its 50th anniversary in 2026.

The players