Semper Diving & Marine is a Marine Contractor located in Charlestown, MA that services all of Charlestown & the surrounding areas. We specialize in Commercial Diving, ROV, AUV, Tunnels, Underwater Construction, Subsea Surveys, Marine Restoration, Offshore Construction, Marine Contracting, Out Fall Conduit Repair and Restoration, and Underwater Pipe Installation. For years we have been the trusted go to source for those in need of Marine Construction Services, and strive to not only meet our client’s expectations but to exceed them. If you are looking for a Marine Contractor, Heavy Civil Contractor, Marine Civil Contractor, or Marine Facility, then Semper Diving & Marine is the smart choice. Contact us today to inquire about our services. Commercial Diving,ROV,Marine Restoration,Underwater Pipe Intallation,Underwater Construction Cash, Check "Monday 07:00 AM - 04:00 PM Tuesday 07:00 AM - 04:00 PM Wednesday 07:00 AM - 04:00 PM Thursday 07:00 AM - 04:00 PM Friday 07:00 AM - 04:00 PM Saturday Closed - Closed Sunday Closed - Closed"