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In 1981, the local geologist Lou Lepp founded our company with an innovative vision. Lou aimed to blend the sciences of geology, hydrogeology, and the environment with the form and structure of geotechnical engineering. By recognizing the interconnectedness of these fields, he believed that he could provide his clients with a comprehensive understanding of their projects.

Today, we take great pride in carrying on Lou's legacy and fulfilling his vision through the expertise and enthusiasm of our experienced team. With a broad and deeply-rooted practice of geotechnical, geologic, hydrogeologic, and environmental engineering, we employ a specialized staff that brings expertise across numerous disciplines.

We believe that success is built on the foundation of teamwork, clear communication, and well-defined goals. Everyone on our staff plays an integral role in achieving our objectives, and we work collaboratively to ensure that we are all moving in the same direction. At the end of the day, our success is a testament to the power of teamwork, and we're proud to be a part of such a dedicated and talented group of professionals.



Bruce Blyton, P.E.

Senior Principal Geotechnical Engineer & President 


Matt Miller, P.E.

Principal Geotechnical Engineer

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Jay Chennault, L.Hg. P.E.

Principal Hydrogeologist/Engineer

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Carrie Mozingo, L.G., L.E.G., P.E.

Principal Engineering Geologist/Engineer

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Kurt Merriman, P.E.

Senior Principal Geotechnical Engineer

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Curtis Koger, L.G., L.E.G., L.Hg.

Senior Principal Geologist / Hydrogeolgist

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Jennifer H. Saltonstall, L.G., L.Hg.

Principal Geologist / Hydrogeologist

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Bruce Guenzler, L.G., L.E.G.

Principal Geologist


Jeff Laub, P.E., L.G., L.E.G.

Associate Engineering Geologist

Scott Hannah, L.G., L.E.G.

Senior Geologist

Bradford Drew, P.E.

Senior Engineer

Josh Greer, L.G., L.E.G., CESCL

Project Geologist

Brendan Young, L.G.

Senior Staff Geologist

Elise Freeman, G.I.T

Staff Geologist in Training

Catherine Ikeda

Soils Laboratory  Manager

Jackson Lundgren

Geotechnical Field Technician

Collin Marshall

Geotechnical Field Technician

Stephen Siebert, P.E.

Associate Geotechnical Engineer

Tim Peter, L.E.G., L.Hg.

Senior Project Geologist

Tony Romanick, P.E., CESCL

Senior Engineer

Peter Linton, L.G.,  CESCL

Senior Staff Geologist

Alex Ybarra, L.G. CESCL

Senior Staff Geologist

Aaron Turnley, G.I.T. CESCL

Senior Staff Geotechnical Field Specialist

Lara Koger

Project Environmental/Geoscientist 

Jon Hansen, CESCL

Senior Staff Geotechnical Field Specialist

Kristen Marohl, G.I.T.

Senior Staff Geologist in Training

Devon Nutter

Geotechnical Field Technician


Chris Allen, L.G., L.Hg.

Associate Hydrogeologist

Luke Mioduszewki, L.Hg., L.G., CESCL

Project Geologist

Stan Thompson, L.G., L.Hg.

Senior Project Geologist

Brennan Nowak

Senior Staff Field Specialist

Alex Johanson, G.I.T.

Staff Geologist in Training

Gus Carlson, G.I.T

Staff Geologist in Training

Jess Hocking L.G.

Project Geologist

Lam Nguyen, L.G.

Senior Staff Geologist

Anton Ypma, L.G., L.Hg.

Senior Staff Geologist

Matthew Porter, L.G., L.Hg.

Senior Staff Geologist

Katie Faber

Staff Water Resources Scientist


Timothy Brown, L.Hg.

Associate Hydrogeologist

Beau A. Johnson, L.G.

Senior Geologist


Ryan Tuomisto

Business Development Manager


Laura Jackson-Kinney

Accounting Manager / Human Resources


Camille Essley

AR/AP Specialist


Susana Hernandez

AR/AP Specialist


Rabecca Larson

AR/AP Specialist

Misty Green

Business Operations Manager

Keleigh Sharp 

Front Desk Coordinator

Alexis Krapas

Project Assistant

Celebrity Banawis

Data Entry

Regan Oswald

Administrative Assistant

Linda Downey

Senior Technical Editor

J. Harrington, CESCL

Technical Editor and Contributor

Nicole Fink

GIS Technical Lead

Karen Behm

GIS Analyst

Michael Trop

GIS Analyst

Beth Nelson

Graphics Specialist

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