About |
The Castle Group consists of three companies, offering unparalleled innovation, execution, and timeliness: WJ Castle PE & Associates, Hydro-Marine Construction, Simplified Bridge Systems.
WJ Castle PE & Associates - William J. Castle PE & Associates, founded in 1983, are a structural/civil engineering company. We provide structural designs, underwater inspection services, testing, and more.
Hydro-Marine Construction - Founded in 1997, Hydro-Marine Construction has enabled The Castle Group to provide construction and design/build services using our own personnel.
Simplified Bridge Systems - Established in 2001, Simplified Bridge Systems designs and builds customized prefabricated bridge systems, then delivers and installs them on-site.
The result is a marine engineering firm informed by real-world dynamics and a marine construction company that can draw on the expertise of seasoned engineers. Based in Philadelphia Pennsylvania but servicing the Northeast and the entire United States, we’re ready to contribute to your next project.
W.J. Castle is a certified SBE and VOSB and Hydro-Marine is a WBE.