Welcome, TerraSite Design, to the Interstate Engineering Team!

Latest News

Empowered by Culture. Inspired by Leadership.

Thriving In a Culture of Support, Accountability, and Pride.

A man smiling at the camera giving two thumbs up

We believe great work begins with great people—and great people thrive in a culture that supports them. At Interstate Engineering, we lead with integrity, curiosity, and care. From brainstorming big ideas to celebrating everyday wins, we show up for one another and grow together. Every team member helps shape who we are, building a culture rooted in purpose, collaboration, and pride in the work we do.

Mission

Interstate Engineering is committed to improving the quality of life throughout the region by providing engineering, surveying, and planning solutions that are founded on trust, efficiency, and professionalism. Guided by individuals who care about the well-being of others, Interstate Engineering strives to leave an impression of integrity, quality, and loyalty on the communities it serves.

Vision

To be the trusted, professional team people think of for versatility, innovation, and strong community.

Values

Strong Work Ethic

Helping Others

Loyalty

Integrity

Group of employees wearing ESOP shirts and smiling at the camera
Group of employees wearing ESOP shirts and smiling at the camera
Three employees standing by the company logo
Group of employees wearing ESOP shirts and smiling at the camera
Two people wearing ESOP shirts and smiling at the camera
Group of employees outside with a dog in front wearing ESOP shirts and smiling at the camera
Group of employees wearing ESOP shirts and smiling at the camera
Group of employees wearing ESOP shirts and smiling at the camera
Group of employees wearing ESOP shirts and smiling at the camera
Group of employees wearing ESOP shirts and smiling at the camera
Group of employees wearing ESOP shirts and smiling at the camera
Group of employees outside wearing ESOP shirts and smiling at the camera
Group of employees wearing ESOP shirts and smiling at the camera

We Are Employee Owned.

We’re Proud To Be Employee Owned. Through Our Employee Stock Ownership Plan, Eligible Team Members Share In the Growth They Help Create.

Community at Heart

When we take on a project, we are invested, not just involved. We have an office in nearly every community where we work because we are neighbors first. We care about the work we do and the places we live.

Discover how we make a difference in our communities. 

Explanation of InterActive community involvement with program logo
Four people in hard hats and safety vests at the bowling alley, one holding a bowling ball over his head
Several employees in green shirts standing in front of a Habitat for Humanity trailer
Two employees in red aprons standing by a Salvation Army bell ringing station
Group of people holding a banner standing in front of a pickup with two dogs in front
Two people standing in front of a collection of paper bags filled with goods
Pickup covered in lights in the dark
People standing behind a table full of food
Five people holding holiday gifts
A lighted parade float pictured in the dark being pulled by a pickup
T shirt with text on it

Effort Rewarded, Excellence Remembered.

We’re honored to be recognized by industry and regional organizations for our work and leadership. While awards aren’t what drive us, they remind us of the trust our clients place in us — and the responsibility we have to keep earning it.

ND Association of County Engineers

Outstanding Project Award

ACEC ND, 2021

GIS Improvement Project

Prairie Business

50 Best Places To Work

PSMJ Resources, 2021

Circle of Excellence Winner

North Dakota League of Cities

Leadership of Community Impact

Montana Infrastructure

Partner of the Year

ND American Society of Landscape Architects, 2025

Award of Merit for Williston Parks & Recreation District Parks & Open Space Plan Planning & Analysis

Bismarck-Mandan Chamber EDC, 2025

20 Under 40
Gordon Lemmel