Ocean engineering, naval architecture and project management services. Henderson & Associates, PLLC (H&A) is an ocean engineering and naval architecture firm headquartered in Ponte Vedra Beach, FL. Founded in 2017 by a former U.S. Navy Diver and licensed professional engineer, H&A combines over 30 years of practical underwater experience with precision engineering to spearhead interdisciplinary projects for public and private clients in all marine sectors, including defense, underwater infrastructure and dams, oil and gas, commercial boating, superyachts, and salvage. Emergency Consultation, (904) 437-4535 Shawn@Ocean-Engineers.com