Senior Leadership Team
Technical Directors
Principals & Senior Advisors
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Steven O. Helgen
Principal, Hydrology, Geosciences, and Chemistry
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John Samuelian, Ph.D.
Associate of Integral
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Susan B. Welt, MPH, P.E.
Principal, Engineering
Corporate Directors
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Sarah Cash
HR Director of Operations
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Patrick Smith, Esq.
Contract and Risk Services Director
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Shawn Walkley
Director of Information Technology
Technical Staff
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Sarah Albano, P.E.
Senior Consultant
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Shannon Ashurst
Consultant
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Sara M. Barbuto
Senior Consultant
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Sarah Beilman
Assistant Scientist
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Stephen Bentsen, P.E.
Senior Consultant
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Spencer Boock, E.I.T.
Associate Engineer
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Samantha Dietz, CE
Associate Scientist
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Samantha Eanes, P.E.
Senior Engineer
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Silvia Gianetti Barber
Senior Consultant
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Shea Grady
Assistant Scientist
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Sydney Harvey
Economic Analyst
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Sarah M. Kissell
Senior Engineer
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Sadie McGarvey
Consultant
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Kara R. Scheu, Ph.D.
Consultant
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Natalie Schneider
Associate Data / Solution Engineer
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Naomi A. Schowalter
Consultant
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Mark Schroeder, P.E.
Engineer
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Conner Schultz
Senior Scientist
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Thomas R. Schulz
Senior Data / Solution Engineer
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Kerri D. Seger, Ph.D.
Consultant
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Charles Shaw
Scientist
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Stephen Sherman, P.G.
Consultant
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Katelynn Shields, LSRP
Consultant
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Anthony J. Shields, P.E.
Consultant
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Christopher W. Sinton, Ph.D., R.G.
Consultant
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Jedidiah Sirk, P.E.
Senior Consultant
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Frank W. Spada
Senior Scientist
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Geordee Spilkia
Scientist
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William Stansfield
Scientist
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Courtney Stratton
Associate Data / Solution Engineer
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Madeline Streifer, Ph.D.
Project Scientist
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Heather M. Summers
Senior Consultant
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Jane L. Sund, P.E.
Senior Consultant
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Roderick Swan, P.G.
Senior Scientist
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Michael Sweetenham, P.G.
Consultant