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    28’ (8.7m) TOMBOLO 28 OB CRUISER

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    156’ (47.5m) M/Y ROCHADE

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    133’ (40.5m) M/Y ONIKA CENTRAL STAIRS

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    133’ (40.5m) M/Y ONIKA SUN DECK

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    240’ (73m) AFT DECK & BEACH CONCEPT

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    133’ (40.5m) M/Y ONIKA

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    TOMBOLO 34 (10.3m) Cruiser


Elegantly efficient

Siewert Design is an award-winning yacht styling and interior design service, providing concepts through to detailed drawings for custom and refit superyachts, and production boats. The studio’s goal is in developing elegant and creative design solutions, always striving for harmony between beauty, comfort, and value.


yacht styling sketch

Yacht Styling

naval architecture

Yacht Interiors

yacht interior design

Refit & Conversion

yacht project management

Project Consulting

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The Beauty of Yacht Design

Yacht building is one of the few remaining artesian crafts in this automated world, which makes designing these vessels a very rewarding profession. Boat design and construction by nature has always been conservative. The risks of an unproven or possible unseaworthy ship are too great. Evolution has been slow, but with modern technology and materials, breakthroughs and never before seen possibilities are emerging.

At Siewert Design we combine that creativity with our knowledge of trends in today's society. Our understanding of the needs of our clients, coupled with these innovations, bring high quality design that is both functional and beautiful. Because there is a strong unity between exterior and interior of a successful yacht, our unique suite of skills can create a special project for you.
Greg is an extremely talented naval architect who blends the science of ship design with the art of creative styling to deliver beautiful, timeless products.
Bill Burns Co-Founder and Executive Director at M Ship Co., LLC
who we are
A trusted resource for owners and builders in the design of custom and production yachts, specializing in styling, interiors, and refit design.
contact us
Telephone: (843) 853-6154
Email: greg@siewertdesign.com
what we do
Yacht & Industrial Design- Exterior Styling, Interior Design, 3D Modeling & Rendering, Refit, and Project Consulting