Geotechnical Principals

C. Barry Butler, P.E., G.E.
Principal Engineer
bbutler@cornerstoneearth.com

John R. Dye, P.E., G.E.
Principal Engineer
jdye@cornerstoneearth.com

Scott E. Fitinghoff, P.E., G.E.
Principal Engineer
sfitinghoff@cornerstoneearth.com

Laura C. Knutson, P.E., G.E.
Principal Engineer
lknutson@cornerstoneearth.com

Danh T. Tran, P.E.
Principal Engineer
dtran@cornerstoneearth.com

Environmental Principals

Ron L. Helm, C.E.G., R.E.A. II
Principal Geologist
rhelm@cornerstoneearth.com

Peter M. Langtry, C.HG., C.E.G.
Principal Geologist
plangtry@cornerstoneearth.com

Cornerstone Earth Group integrates geotechnical engineering, environmental services, engineering geology, and construction services into a single, client-focused team to facilitate cost-effective site selection, project design, and site development. Our technical capabilities and construction and remediation expertise allow us to develop creative but practical solutions to meet your project requirements. With over 130 years of combined Principal experience, our team has the project leadership, experience and practical focus to provide the value-adding service you require.

Cornerstone Earth Group was formed by seven like-minded professionals seeking to offer value-adding services to clients; to create a fun and challenging work and learning environment for employees; and to develop Cornerstone Earth Group's future leaders.