Lithos Engineering is open for business in Colorado providing tunnel, trenchless, geotechnical, and Geological engineering services. Robin Dornfest, Nate Soule, Benny Siljenberg, and Lance Heyer have joined forces to provide client focused engineering services to owners, A/E Firms, and contractors across Colorado and in neighboring states. Lithos Engineering has offices in Fort Collins and Lakewood, Colo.

robin dornfest

Robin Dornfest



“I am extremely proud to be part of such a talented group of engineers who focus on serving our clients’ needs and helping them navigate their challenging projects,” said Lithos Engineering president Robin Dornfest. “Bringing recognizable value has always been my focus and with the Lithos Engineering team, I have no doubt that our clients will quickly find we bring the solutions and value we promise.”

Lithos Engineering was formed with the vision of serving our communities by providing our clients and their projects with recognizable value through prudent site evaluations, constructible solutions, and an understanding of project risks. Lithos focuses on tunnel, trenchless, geotechnical, and geological engineering and design services through innovative, collaborative, client focused consulting uniquely tailored to suit the needs of our clients and their projects.

The combined experience of the Lithos Engineering team spans numerous challenging tunnel, trenchless, geotechnical, and geological engineering projects across Colorado and the United States. Lithos Engineering has several high-profile projects in progress and looks forward to bringing value to their communities for many years to come.

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