Serving Maine, New Hampshire, Massachusetts, Connecticut, Rhode Island, & Vermont

info@rwg-a.com
207-286-8008

Our Principal Engineers and Management Team



Erik J. Wiberg, P.E.

Erik J. Wiberg, P.E.
President & Chief Geotechnical Engineer

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Charles R. Nickerson, P.E.

Charles R. Nickerson, P.E.
Vice President & Principal Geotechnical Engineer

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Erik J. Wiberg, P.E.

Marc R. Grenier, P.E.
Associate and Project Geotechnical Engineer

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Erik J. Wiberg, P.E.

Matthew T. Grady, P.E.
Associate, Materials Engineer, and Materials Testing Manager

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Professional Staff



David Walker

David E. Walker
Licensed Geologist

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