DJ&A
Professional ServicesMontana, United States51-200 Employees
DJ&A is a multidisciplinary professional services consulting firm based in Missoula, Montana, with offices across the western United States. Founded in 1973 by two former U.S. Forest Service employees, the firm has grown by applying the founders' values to a broad range of projects. It serves clients nationwide, delivering a wide scope of engineering, planning, environmental, and related services. Its offerings span civil and transportation engineering and planning, structural engineering, environmental engineering and management, water and wastewater engineering, survey and mapping, GIS, landscape architecture, hydrology and hydraulics, dam engineering, right of way services, and construction management. In 2026, DJ&A announced a strategic partnership with WEST Consultants, Inc., reflecting continued collaboration with other specialty firms to address client needs.