Press Release

Lithos Engineering joins GEI Consultants

September 20, 2023

Colorado-based firm specializes in tunnel and trenchless design and construction technology

Pipeline cutterhead being installed by crane

Colorado-based Lithos specializes in tunnel and trenchless design and construction technology. Their experts played a pivotal role in the Second Creek Interceptor Project for Metro Water Recovery in Denver and Adams Counties. This project included the design and construction of an approximately 17.5-mile long pipeline, to alleviate capacity constraints and aging pump station and pipeline infrastructure in the system.

Denver, CO (September 20, 2023) – Colorado-based Lithos Engineering has joined GEI Consultants. Lithos is a 27-person engineering firm specializing in tunnel and trenchless design and construction technology. Lithos provides a wide range of geotechnical and geological engineering solutions to a diverse client base, both in Colorado and throughout the United States, where they have successfully completed hundreds of projects in the public and private sectors.  

“Lithos’ highly specialized services – particularly the team’s expertise in tunneling – are a perfect complement to GEI’s geotechnical engineering and tunneling capabilities,” says Ron Palmieri, President and CEO of GEI. “We have long sought additional expertise in this service area and, in Lithos, we found a partner with shared values, culture, and commitment to delivering exceptional value and client service. The Lithos team will immediately bring value to many of our water infrastructure projects and GEI provides Lithos access to a strong bench of technical experts for their clients’ benefit.”   

“For Lithos, joining GEI is a perfect fit,” says Robin Dornfest, President of Lithos Engineering. “Lithos has experienced considerable success and growth since our humble beginnings, resulting in the need and desire to further invest in our employees, systems, and clients to ensure an exciting and rewarding future for us all. Creating opportunities for our team has always been our mission and this merger enables us to realize that mission. As an employee-owned private company, GEI has the resources, experience, service mix, and culture that fits Lithos’ current and future needs. An attractive feature of this merger is the opportunity for all Lithos employees to become owners in the business as ownership opportunities are offered to all GEI employees.”        


About GEI: GEI Consultants, Inc. is a consulting engineering firm that delivers professional services that improve our world’s built environment. With more than 1,400 staff and 55 offices in North America, GEI is a leader in providing multi-disciplined engineering and environmental services to a range of private and public sector clients, both domestically and abroad.  

As a member of the employee-owned GISI family of companies, we foster personal relationships with our clients and support our staff in a partnership model, which is underpinned by continuous learning and sharing of knowledge. We retain proven, recognized experts and attract the best minds to deliver to our clients a refreshing blend of technical expertise, collaborative spirit, and innovation that is rare in our profession. We engineer solutions in five primary end markets: Water Resources, Energy, Buildings, Infrastructure, and Industrial. For more information on GEI, please visit  

About Lithos: 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 geotechnical, tunnel, trenchless, and geological engineering and design services through innovative, collaborative, client focused consulting uniquely tailored to suit the needs of our clients and their projects. For more information, visit

Media Contact:

Rachel Sa
Director of Communications
GEI Consultants
(647) 988-9300