John Butler Design a Sydney Naval Architect provides a full range of marine consultancy services. With a strong local knowledge of the Australian maritime industry, John Butler Design is ideally positioned to providing quality, cost effective and innovative marine consultancy services to the commercial marine industry and the Australian Defence industry through the DMO. We work closely with vessel owners and operators, Ship Managers, Shipyards and Ship repairers, and have experience working with Government Departments and Agencies.


Based on tried and tested techniques, our broad ranging services extend from marine transport feasibility studies through to final ship design packages, construction supervision, production engineering support and liaison with Classification Societies. Our Naval Architecture and Mechanical Design consultancy services include condition assessments, structural analysis (FEA), detail 3D/2D design, sea keeping & stability analysis, shock analysis, along with preparation of specification and technical documentation.


Due Northwest of Sydney, we are located 45 minutes from Captain Cook dock at Garden Island NSW and only 2 hours from the Newcastle ship yards. We can arrange access to HMAS KUTTABUL and HMAS WATERHEN to perform ship-checks and condition assessments.




Combining tried and tested techniques with modern computing capability to engineer the best custom outputs and solutions to meet your needs.


Applying dynamic design philosophy centered around functionality and client vision, whether designing to class or taking on challenging new projects.


Translating information sets into accurate 2D or 3D outputs for concept development, class approval and production.


Broad spectrum structural design and analysis coupled years of experience and detailed FEA capabilities, we are equipped to solve a wide range of engineering challenges.


Seeing all  types of vessel through survey, thereby expanding the operating profile of your vessel and ensuring its safety well-being.


Helping to manage and coordinate any project so that it completes within budget and time projections.

Completed Projects
Combined Years of Experience
"It is good to see a report to the high standard we have come to expect from you."
Richard Dunworth
Navy Technical Bureau
"I can't recommend John Butler Design enough! His team that came out to do the incline test on my vessel were very professional and got the results I was looking for."
Bradley Kerslake
Captain | Spirit Fleet
"John is certainly helping out the Sydney Heritage Fleet in getting the restored John Oxley steam ship back in the water. He has just completed the ships stability calculations."
glen rigden
Glen Rigden
Sydney Heritage Fleet
"John offers a superb service and his attention to detail is second to none. Highly recommended.""
Chris Gibbs 2
Chris Gibbs
MD | Cribbs Design