John C. Wilhelm, P.E.

^President

John C. Wilhelm, P.E. has served as President of Pickering, Corts & Summerson since 2011. Mr. Wilhelm is involved in all aspects of the firm, and has over 30 years of experience in the structural design and inspection of bridges. He is a graduate of Drexel University with a B.S. in Civil Engineering and is a registered Professional Engineer in Pennsylvania, New Jersey, Delaware, Maryland, New York, and West Virginia. John is an active member of the American Society of Civil Engineers (ASCE) and the American Society of Highway Engineers (ASHE).

James S. White, Jr.

^{Chief Operating Officer (COO)}

James “Jim” White serves as Chief Operating Officer (COO) of Pickering, Corts & Summerson, overseeing the day-to-day administrative and operational functions of the company. Jim has been with PCS for over 25 years and is a member of our Board of Directors. He is a PennDOT Certified Bridge Safety Inspector, and is responsible for the administration of all National Bridge Inspection Standards (NBIS) Inspection Agreements.

Mark A. Havers, P.E.

^{Vice President}

Mark Havers joined Pickering, Corts & Summerson in 2002 and serves as Vice President and Manager of Site Engineering. Mark is a graduate of the University of Pittsburgh with a B.S. in Civil Engineering Technology, and Pennsylvania State University with a B.S. in Landscape Contracting. He is a registered Professional Engineer in Pennsylvania, New Jersey, Maryland, and West Virginia. Mark has been a PCS Board Member for over a decade.

Richard H. Stanger, P.E.

^{Vice President}

Richard “Rick” Stanger has been with Pickering, Corts & Summerson for over 25 years and serves as Manager of Transportation Design. Rick oversees the firm’s technical disciplines of structural design and highway engineering. He is a graduate of Pennsylvania State University with a B.S. in Civil Engineering and is a registered Professional Engineer in Pennsylvania, New Jersey, New York, and West Virginia. Rick has been a member of the PCS Board of Directors for over 10 years.

Aaron S. Detwiler, P.E.

^{Vice President}

Aaron Detwiler, P.E. joined Pickering, Corts & Summerson in 2007 and serves as Vice President and Bridge Inspection Project Manager. He has inspected well over 2,000 structures for PennDOT, NJDOT, USFS, DCNR and various Local Owners including the In-Depth inspections and Load Ratings of some of the region’s most complex structures. As a project manager, he has overseen various projects for PennDOT, NJDOT, and the USFS consisting of Bridge Inspection (Routine/In-Depth), Load Rating, Emergency Repair, and Rehabilitation/Replacement. Aaron has managed PCS’ Phillipsburg, NJ office since 2013.

Paul Klemunes, P.E.

^{Vice President}

Paul Klemunes, P.E. joined Pickering, Corts & Summerson in 2017 and serves as Vice President and Project Manager for both design and inspection projects. His extensive structural experience includes the preservation, rehabilitation, replacement, and inspection of bridges. Paul graduated from Pennsylvania State University with a Bachelor of Science in Civil Engineering and is a licensed engineer in Pennsylvania, Connecticut, Maryland, New York, Virginia, and West Virginia.

John P. Ziemblicki, P.E.

^{Vice President}

John Ziemblicki, P.E. joined Pickering, Corts & Summerson in 2009 and serves as Vice President and Structural Design Project Manager. He has extensive experience in performing and managing bridge replacement, rehabilitation, and NBIS inspection projects in Pennsylvania and New Jersey. John is a graduate of Drexel University with a Bachelor of Science in Architectural Engineering – Structural Concentration and a licensed engineer in Pennsylvania, New Jersey, and Delaware.