• SWI Partners from left to right: Art Beckwith, Guillermo Cortes,and John Wesnitzer.


About Us

We manage numerous multi-million dollar, large-scale projects from the initial planning stages through design document assembly, permit approval and construction management. Our team features an assortment of engineers, surveyors, and designers who call northern Arizona their home.

SWI strives to provide creative, high-quality civil engineering services to our clients regardless of the size of the job. We pride ourselves on our ability to work with existing natural features to optimize the value of the constructed product, while preserving the unique beauty of the Southwest.


Shephard-Wesnitzer, Inc. (SWI) opened its doors in Sedona on March 16, 1990 through the efforts of John Wesnitzer and David Shephard.

Shephard spent 20 years in Alaska, where he had worked for the U.S. Forest Service, National Weather Service, and his own firm. Wesnitzer came to Sedona from Maine, after spending the first 12 years of his engineering career in Wyoming designing roads, irrigation canals, dams, and pipelines. Both men shared a love for the natural beauty and challenges of the Southwest and found themselves in Sedona in 1990.

SWI began with four employees in Sedona and has now grown to more than 25 employees with four offices in Flagstaff, Sedona, Prescott and Cottonwood throughout northern Arizona. The Cottonwood office opened in 1995, the Flagstaff office quickly following in 1996. The Prescott office opened in 1999. We have striven to grow steadily and strategically, allowing each office to become a fixture in the local community before setting our sights on a new location in northern Arizona.

Over the past 25 years, new principal partners were brought in and Shephard retired in 2006. Today, John Wesnitzer serves as President with his wife, Nancy, as Treasurer. Art Beckwith and Guillermo Cortes have also joined the ranks as Vice Presidents. Art joined SWI in 1994 after a 16-year career in northern California. He currently co-manages the Sedona office with John. Guillermo joined SWI in 1995 after graduating from Northern Arizona University. He started his career as an intern for the Arizona Department of Transportation while attending NAU, and remains SWI’s lead Transportation Engineer. Guillermo remains in Flagstaff and manages the Flagstaff office.