Choose your country or region
Please select your location to see the most relevant information from Keller
-
Africa
-
Asia-Pacific
-
Europe
-
Middle East
-
North America
-
Keller Group
Based in the Philadelphia area, Keller supports projects across Eastern Pennsylvania, Southern New Jersey, and Delaware. Our teams bring regional expertise across diverse site conditions, from dense urban environments to infrastructure and industrial developments. We excel at providing design-build solutions for the Karst geology of Eastern Pennsylvania.
Geotechnical expertise in Philadelphia
The Philadelphia region presents unique geotechnical challenges, particularly related to karst geology and subsurface variability. Keller’s local teams have experience addressing:
- Karst formations that can lead to voids, sinkholes, and instability
- Variable soil and rock conditions affecting foundation performance
- Ground improvement and stabilization for redeveloped and existing sites
- Infrastructure and urban construction in constrained environments
These conditions require specialized solutions such as micropiles and compaction grouting to ensure long-term stability and performance.
Our geotechnical solutions
Key contacts
Mark Careyva, PE is a Branch Manager at Keller North America.
Mark has over 18 years of experience in the heavy construction industry, including 12 years specializing in deep foundations with Keller. He holds a Bachelor of Science in Civil Engineering from Lehigh University and is a licensed Professional Engineer in Pennsylvania.
As a key member of Keller’s Drilled Shaft Product Team, Mark has played an integral role in securing and delivering complex projects nationwide while leading operations for the PA/OH Branch, with a focus on strong client partnerships and engineered, efficient solutions.
Robert Pletcher, PE, is a Senior Project Manager at Keller North America.
Since joining Keller in 2014, Robert has managed a wide range of geotechnical construction projects involving rigid inclusions, micropiles, deep foundations, and ground improvement systems. In his current role, Robert is responsible for project management, estimating, client coordination, engineering oversight, and the successful delivery of complex geotechnical construction projects throughout the Northeast. He earned a degree in Civil Engineering from Drexel University and is a licensed Professional Engineer.
Daniel Dupre, PE, holds a BA in Civil Engineering from the University of Miami. He started his career with Keller in Miami in 2015 as a field engineer focused on augercast pile installation, then transitioned to the estimating department. In 2018, Daniel relocated to the Philadelphia office and was promoted to Pre-Construction Manager for the PA/DE/South Jersey area in 2023. He is committed to developing and maintaining client relationships via early and active involvement on projects, developing value engineering and logistics solutions. Daniel has experience estimating all Keller techniques, now focused on deep foundations, support of excavation, and compaction grouting for sinkhole remediation.
Featured projects
Institutional
Audenried High School
Construction of a new high school in historic Philadelphia required treatment of 20 feet of urban fill. Ground improvement was used to treat the poor subgrade soils.
Commercial
McClelland Transmission Line
Keller offered an accelerated schedule to complete all work in a single phase rather than the two originally planned and was able to assist in finishing ahead of the client’s anticipated schedule, which saved them money.
1