Diverse Projects • Solutions That Last.

View Now



AESI, headquartered in beautiful Bozeman, Montana, has provided quality civil engineering, geotechnical engineering, water resources engineering, land surveying, structural engineering, and construction services for over 20 years.

AESI won PSMJ's "Circle of Excellence" designation for successful firm management and was awarded Honorable Mention in the national CE News "Best Engineering Firms to Work For" Contest. We pride ourselves on keeping great clients, attracting and developing outstanding people in the firm, maintaining a positive company culture, and successfully completing projects with enthusiasm, integrity, and excellence.

Our success is due largely to our exceptional concern for the satisfaction of our clients and staff. Ultimately, excellent staff and a company culture promoting customer service result in high quality, high value engineering solutions for a diverse range of projects.



Principal, PhD, PE
Doug is the President and founding Principal of AESI. He has been practicing engineering consulting since 1985 and specializes in geotechnical engineering and applied geosciences.


Principal, LS
Greg, a Principal Surveyor and Project Surveyor, has been surveying since 1982 and has extensive experience in all phases of land surveying, including land use design and construction from initial scope to final plan.


Principal, PE, MSCE
Craig, a Principal Geotechnical Engineer and Project Manager, has work for AESI and its predecessor since 1995 and specializes in geotechnical exploration and analysis, as well as laboratory testing of soils and on-site construction monitoring.


Principal, PE, MSCE
Mark, a Principal, Senior Civil Engineer, and Project Manager, began his engineering career in 1996 and has extensive experience managing a variety of large and small scale civil and environmental projects.


At Allied Engineering Services, Inc. (AESI) we strive to provide the absolutely best product to our client(s) that we can while paying close attention to the project timeline, civil responsibilities, and fiscal restraints.

  • We're really good at what we do
  • We work hard to fulfill our client's needs within the regulatory, cultural, and environmental world we live in.
  • We go the extra mile to make sure your projects are successful
  • We work well within teams, meeting timelines, sharing information, and collaborating on project goals


  • Big Sky Woodwork & Design, Inc. has engaged the services of Allied Engineering for numerous, large residential projects over the last ten years. Allied has consistently offered a variety of engineering disciplines that have proven to be reliable, accommodating and thorough. Allied has also often performed, unwaveringly, under extremely challenging and complex conditions due to the locations of the projects.

    John SeelyePresident - Big Sky Woodwork & Design, Inc.
  • We felt fortunate to have retained your excellent services and to have obtained such a thorough and scientifically grounded report.

    Daniel PinkstonUS Department of Justice
  • I have worked with Allied Engineering on a number of projects. I have been impressed with their innovative thinking and attention to detail. The staff at Allied has always taken the time to understand regulations and requirements, which has made our job as a state regulatory agency easier.

    Michele Lemieux, PEMontana Department of Natural Resources and Conservation
  • Your staff of Engineers and technical support people have done an absolutely excellent job of providing us with professional engineering services in every aspect of this project, from the introductory meetings through the soils and geotechnical analysis and design and most recently through the site analysis and design services.

    Michael Pentecost, AIADzyn2 Architects, PLLC
  • I have worked with Allied Engineering Services on several jobs and have found their services to be excellent. As a small engineering company specializing in hydrology and hydraulics I have come to rely on Allied for most of my surveying and AutoCAD work. Their work is very professional and efficient.

    Joe Van Mullem, PEVan Mullem Engineering, PLLC
  • On behalf of RPS, LLC associates I would like to express our sincere thanks to you and your firm for performing site engineering and preparing a very professional and thorough feasibility study for our Cobb Hill property.

    Michael SchlauchRPS, LLC
More Projects
Important Links

Idea Center

Have an idea for a project in your community? Fill out our online form to let us know.

Recent Projects

Browse through a selection of our projects and give us your thoughts on your favorites.

How Can AESI Help You?

Fill out our simple online form to get called by an engineer or surveyor regarding your upcoming project.

Join Our Team

Are you a dynamic and professional individual?

Current News and Events

See what AESI has been up to recently.