Marine Engineering Company | Marine Construction

Marine Engineering, Marine Design & Diagnostic Services

Founded by William J. Castle in 1983, we are a structural/civil engineering company. We provide structural designs, underwater inspection services, testing, and more to both ... read more about W. J. Castle and Associates

Marine Construction & Repair

Since 1997 Hydro-Marine has enabled The Castle Group to provide construction and design/build services using our own personnel. This gives us tremendous control over ... read more about Hydro-Marine Construction

Bridge Design and Bridge Construction | Prefabricated Bridges

Established in 2001, this company provides customized prefabricated bridge systems. All engineering, from preliminary to final, including actual construction and ... read more about Simplified Bridge Systems