Founded in 1973, DJ&A is a multidisciplinary professional services consulting firm in Missoula, MT, Vancouver, WA, Denver, CO, and Sioux Falls, SD. Our team of 80+ professionals works across the country to deliver a diverse range of engineering, environmental, survey, and planning projects for federal, local, and private clientele.

Quality.

Our team has built a reputation of excellence in the services we provide our community and the results we produce for our clients. See what we’ve accomplished together.

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Innovation.

We invest in the future by staying at the forefront of sustainability and technology, and in turn, ensure our clients always get the best value and outcomes on their projects. Learn what we can do.

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Relationships.

As a small business with extensive federal work experience, we are committed to forging long-term relationships with our clients and like-minded partners. Learn more about teaming with us.

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