Lisa M. Grill, Marketing Manager
WDP Office: Manassas For over 15 years, Lisa worked as the Administrative Coordinator in WDP’s Materials Testing and Inspections division. She supported the Division Manager / Sr. Geotechnical Engineer, the Laboratory Manager, and field staff in their day to day operations, including daily contact with contractors and project managers, while also assisting WDP’s marketing team. In March of 2020, Lisa […]
Timothy A. Apisa, LEED AP, Senior Project Manager, Blacksburg Division Manager
WDP Office: Blacksburg Tim is the Division Manager of the Southwest Virginia region and knowledgeable about all aspects of construction administration, site inspections, and structural and architectural analysis. He has over 20 years of experience in the industry working on large commercial construction projects. Tim is a LEED Accredited Professional and a Licensed Field Auditor with […]
Byoung-Jun (BJ) Lee, PhD, PE, SE, Associate, Senior Structural Engineer
WDP Office: Manassas BJ Lee is an expert in structural engineering with special emphasis on building enclosure systems, including structural steel, concrete, masonry, and wood. He has over 20 years of experience in structural analysis and repair, the evaluation of existing structures, and nondestructive testing of concrete structures. BJ has written over 15 technical papers and […]
Andrew W. Wagner, PE, Senior Associate, Central Virginia Division Manager
WDP Office: Charlottesville Andrew is experienced in the evaluation and repair of building enclosures and facades with a specialized focus on post occupancy failures. His expertise in multiple industry sectors helps his clients diagnose, remedy, and prevent problems. Andrew is active in the development of new industry standards through ASTM and is the current Task […]
Benjamin Townsend, PE, Associate, New York Division Manager
WDP Office: New York Ben’s expertise centers around forensic structural evaluation, building enclosure consulting and building enclosure commissioning (BECx). He serves as Division Manager for our New York City office. He actively contributes to industry committees by developing standards and presenting topics. Ben serves as the BECx Agent on projects across the eastern United States, […]
John M. Grill, PE, Senior Associate, Manassas Headquarters Division Manager
WDP Office: Manassas John’s expertise in non-destructive evaluation and the condition assessment and repair of concrete structures has allowed him to lead projects involving tunnels, bridges, power plants, high rise structures, and historic buildings. His leadership over multiple IDIQ Contracts for the AOC has supported the continual use, maintenance, and improvement of the client’s critical […]
Robert J. Niber, PE, Principal, Geotechnical Engineering and Testing & Inspection Division Manager
WDP Office: Manassas Rob leads geotechnical explorations for new project design support as well as forensic investigations involving geological/geotechnical failures. His geotechnical expertise has provided practical, cost-efficient solutions for foundations and slabs, retaining systems and slopes, utilities, pavements, stormwater management/best management practices (SWM/BMP) facilities, and earthwork quality control guidelines and recommendations. Rob is actively involved […]
Rex A. Cyphers, PE, Principal, Chief Operating Officer
WDP Offices: West Virginia & Charlottesville Rex specializes in the design and repair of masonry structures, historic preservation, and nondestructive testing. In this capacity he works on a range of projects, from repair of century-old masonry buildings to leakage issues in modern buildings to design reviews for new construction, applying his knowledge of building facades and envelopes […]
J. Eric Peterson, PE, Principal, Chief Executive Officer
WDP Offices: Blacksburg & Manassas Eric is a leader in building envelope engineering with a specialization in structural, material, and architectural engineering related to facades and building envelope failures, nondestructive testing, and design and repair of concrete and masonry structures. He has expertise in structural and architectural retrofit and repair, roofing and waterproofing investigations, and […]
Gerald A. Dalrymple, PE, Founding Principal
WDP Office: Manassas Andy is a leader in forensic structural engineering specializing in failure investigations, rehabilitation of existing structures, development of restoration design specifications, construction management and inspection, and litigation support. He co-founded WDP & Associates in 1995 and has since assumed the role of overseeing WDP’s technical work product, ensuring the consistent delivery of […]
