DJ&A is a multidisciplinary professional services consulting firm that delivers a diverse range of services to clients across the nation. Founded in 1973 by two former U.S. Forest Service employees who saw a need for a company that uniquely understood Forest Service projects, DJ&A has continued to grow and expand over the last 49 years by embracing the values of our founders. As of January 1, 2022, we have a team of nearly 100 skilled professionals spanning offices in Missoula, MT; Bozeman, MT; Vancouver, WA; Lakewood, CO; and Sioux Falls, SD. Currently, we have over 100 employees.

Key Service Areas 

Our team of skilled professionals partner with our clients to provide a diverse set of services in support of transportation, infrastructure, and environmental projects across the nation. Our key services include:  

  • Civil Engineering 
  • Landscape Architecture 
  • Transportation Engineering & Planning 
  • Hydrology & Hydraulics 
  • Structural Engineering 
  • Right of Way Services 
  • Water & Wastewater Engineering 
  • Construction Management 
  • Survey & Mapping 
  • Dam Engineering 
  • Value Engineering/Analysis & Facilitation 
  • Environmental Survey 
  • GIS Services 
  • Environmental Permitting, Planning and Management 


Our Clients 

DJ&A serves a wide range of clients including several government agencies, tribal agencies, and private companies. Since 2012, DJ&A has grown its gross revenue from 3.6 million to 17.4 million, with the fastest growth occurring over the last five years. A majority of DJ&A’s revenue comes from the federal sector, including the U.S. Forest Service, Department of Interior, Central Federal Lands Highway Division and Western Federal Lands Highway Division, U.S. Army Corps of Engineers, and the National Parks Service.