Stahly Engineering & Associates has been providing civil engineering services for local and statewide projects for over 45 years. Currently, Stahly has offices located in Helena, Bozeman, and Billings, Montana, where almost 50 professional and support staff are employed.

Our firm provides clients with a wide array of expertise from initial planning and funding to preliminary and final design and services during construction. We are staffed with engineers who specialize in transportation, site development/subdivisions, land survey, structures, water/wastewater, bridges, planning, GIS, and grant writing and administration. In order to provide full service to our clients, engineering staff is supported by individuals who are responsible for survey, construction inspection and testing, drafting, and grant writing and administration.

At Stahly Engineering, we believe that building positive relationships by delivering quality services is the key to our success. Personal involvement from our owners and project managers on individual projects strengthens our commitment to our clients’ goals. Our staff is keenly aware of the day to day operations of the clients we serve. Our availability and sensitivity to client needs provides efficiency and value to our projects.

The engineers and other staff members at Stahly Engineering have developed trust and value in our services and relationships with our clients.


Stahly is a full service civil engineering and survey firm and believes that building positive relationships by delivering quality services is the key to our success. Personal involvement from owners and project managers in individual projects performed and the communities we serve strengthens our commitment to our clients' goals. Stahly Engineering provides engineering services in the fields of transportation, site development, water and wastewater systems, and structures. We also assist public and private clients with planning, grant writing and administration, GIS, all types of survey services, and construction inspection. 


The inspiration behind Stahly Engineering’s business philosophy is the founder, J. David Stahly (Dave). "It was Dave's ethics and family values that drew me to Stahly Engineering in the first place," states Greg Benjamin, one of the current owners of the firm. "We intend to carry on the legacy of what he started."   


Moving his family to Helena from Arizona in the late 1960’s, Dave was working on a project for an Arizona based firm. He and his young family liked Helena so much they decided to stay. Staying in the area meant starting an independent firm. Stahly Engineering’s foundation was made solid with the help of the entire Stahly family. Dave’s wife Carol along with Mark, Mike, Byron, Alana and Dan all participated in various jobs as the company grew.


"Dad's influence on us was always by example," Byron Stahly said. "What Stahly Engineering is today is a direct result of Dad's life principals of hard work and integrity. I know how valuable an influence in my personal and professional life my father has been.”


Byron, a professional engineer (P.E.) leads the company today along with his brother Dan, P.L.S. and the Bozeman office manager, Greg Benjamin, P.E. The firm has recently developed an ownership transition plan that will make the firm entirely employee owned. New ownership interest in the business starting in 2013 is associate principals Robie Culver; Clint Smith, C.E.T.; Ryan Rittal, P.E.; Kurt Thomson, P.E.; Amy Strainer; Phil Bachofner, P.E.; Theron Thompson, P.E.; Nick Fish, P.L.S., E.I.; Dave Gates, P.E.; and Cordell Pool, P.E. These individuals are committed to continuing the legacy of service begun by the Stahly family by nurturing personal relationships with their clients, the communities they serve, and the employees that are the backbone of the company’s success.


© 2019 by Stahly Engineering & Associates, Inc. All Rights Reserved.


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