Meet Our Experts

Photo of Stacy Ziegler

Stacy Ziegler, P.E., LEED AP BD+C
Chief Executive Officer

Photo of Deirdre Smith

Deirdre Smith, P.E., LEED AP BD+C
Chief Operating Officer

Photo of Guy Marcozzi

Guy Marcozzi, P.E., LEED AP BD+C Fellow ASCE
President

Photo of Jeff Bross

Jeff Bross, P.E., LEED AP, Fellow ACEC
Sr. Consultant

Photo of Hank Stack

Hank Stack, P.E.
Field Services Division Director

Photo of Scott Hoffman

Scott Hoffman, P.E.
Water Resources Division Director

Photo of Dwight Walters

Dwight Walters, P.E.
Civil Engineering Division Director

Photo of Dave Small

Dave Small
Environmental Division Director

Photo of Jen Gresh

Jen Gresh, P.G.
Philadelphia Division Director

Photo of Matthew Van Rensler

Matthew Van Rensler, P.E.
Geotechnical and Foundations Division Director

Photo of Brian Devine

Brian Devine, P.E.
Director of Special Projects

Photo of Jim Cloonan

Jim Cloonan, P.E., LEED AP
Sr. Consultant

Photo of Rick Beringer

Rick Beringer, P.E., LEED AP
Sr. Consultant

Photo of Mike Kaszyski

Mike Kaszyski, P.E.
Sr. Consultant

Photo of Steve Lewandowski

Steve Lewandowski, P.E.
Sr. Consultant

Photo of Ralph Downard

Ralph Downard
Sr. Consultant

Photo of Steve Cahill

Steve Cahill, P.G.
Sr. Consultant

Photo of Chris Whallon

Chris Whallon, Esq., P.G.
Sr. Consultant

Photo of Todd Frey

Todd Frey, P.E.
Sr. Consultant

Photo of Steve Gorski

Steve Gorski, P.E.
Sr. Consultant

Photo of John Fellows

John Fellows, R.L.A.
Sr. Consultant

Photo of Amy Leib

Amy Leib, P.E.
Sr. Consultant

Photo of Steve Huff

Steve Huff, P.E.
Sr. Consultant

Photo of Andy Jenkins

Andy Jenkins, P.G., LEED AP BD+C
Sr. Consultant

Photo of Join Our Team

Join Our Team
Career Opportunities