You want a consultant who works as hard as you. Hargis consultants provide turnkey program support from science to compliance. We protect your interests by serving as your partner and an extension of your staff. Our team helps you navigate the regulatory framework to complete complex projects on schedule. With Hargis as your partner, you have direct access to environmental experts in hydrogeology and remediation engineering at your fingertips. Connect with our experts today.

Ramy Alrayies
Staff Engineer

Greg Cranham, PG, CEG
Senior Geologist

Scott F. Cunningham
O&M Manager

James S. Davis, PG, RG
Senior Hydrogeologist

David Hargis, PhD
President & CEO

Jennifer Layton-Villarino, MA
Chief Financial Officer

Leo S. Leonhart, PhD, RG, PG, CHG
Principal Hydrogeologist/Senior Technical Director

John Loftus

Michael R. Long, RG, PG, CEM Director, Technical Operations

Theresa Lutz
Quality Control/Quality Assurance Manager

Amanda Morris, PG

Roger A. Niemeyer, PG, CHG, CEG Principal Hydrogeologist

Michael A. Orth, RG

Zach Petersen

Marty A. Pierson
Senior Engineering Technician

Jasmine Reilly
Staff Engineer

Anthony R. Rossi, MS, PE Engineering Manager

Brandon Thompson
Environmental Remediation Technician

Matthew Tinglof

Daniel A. Toffelmier, MS
Senior Hydrogeologist

Peng Vang
Senior Field Technician

Brian R. Waggle, RG, PG, CHG, CEM
Principal Hydrogeologist

We understand the obstacles you face and how to help you push past them.  Ready to complete your projects on-time, on-budget, and with no surprises?

Let’s get started! Request a quote for your upcoming project



Our experts make data easy to understand, helping you communicate critical issues internally and externally. We are happy to share our extensive experience with easy to access case studies, blogs, and newsletters that address critical environmental, water resources, and regulatory issues.


Let’s Connect

How Can We Help?