Our team is passionate, skilled and ready to go above and beyond for you.

Mary K. Atkins, P.E., CPESC, LEED AP

Vice President

Jeff Ballard, P.E.

Senior Project Manager

Jacob A. Barker, C.P.E.S.C.

Environmental Services Project Manager

Joseph Bartos, P.E.

Wastewater Collection Assistant Group Head

Jonathan E. Borgers, P.E.

Senior Project Manager

Ryan K. Brauen, P.E.

Ohio Office Manager and Senior Project Manager

Katie Castro Jackson, P.E.

Project Manager

Nancy Cho, CPESC

Enivironmental Services Project Manager

Eric E. Davis

Business Development Representative

Dreama E. Doolittle, P.E.

Senior Project Manager

Monte Gardner

Construction Services Group Head

Andrew D. Gordon, P.E., C.F.M.

Senior Project Manager

Tyler G. Graves

Business Development Manager

Amy Harvell, CHMM, RPC

Environmental Services Group Head

Robert W. Holden II, Ph.D., P.E., BCEE

Vice President

Aaron Hutton, P.E.

Vice President

Bridget Ingram, P.E.

Project Manager

Dylan L. Lambermont, P.E., LEED AP

Vice President

Jen Landis

Recruiter

Lori Latham

Business Development Representative

William J. Leber, P.E., LEED AP

Stormwater Group Head

Jason Mackiewicz

IT Coordinator

Kasey Marley, P.E.

Project Manager

Melissa A. Mitchell, MSHRM

Vice President of Administration

Wayne C. Moore, P.E.

Electrical Group Head

Mike Nelson

CAD Manager

Shawn R. Perkins, P.E.

Senior Project Engineer

Brian Price, PMP

Instrumentation and Controls Group Head

Jim Purtee, CPA

Controller

Brad A. Robertson

Field Services Manager

Gary L. Ruston, P.E., BCEE

Technical Services Director

Linda J. Sanders

Business Development Representative

Brent A. Siebenthal, P.E.

President

Adam Sitka, P.E.

Project Manager

Andrew Thompson, P.E.

Senior Project Engineer

Jay Thorne, P.E.

Senior Project Manager

Kurt Wanninger

Senior Project Manager

Marty A. Wessler, P.E.

CEO

Jody Williams

Project Manager