The Team Behind GMT Composites


Jonathan Craig.jpg

Jonathan craig - president

Jonathan came to GMT as Director of Sales and Marketing in 2011, and took over as president and owner in 2016. Jonathan started out in composites in the early ‘90’s as director of international sales for the innovative carbon tube manufacturer, Fiberspar Inc., which included managing OEM sales for Neil Pryde Sails and working in product development. He later became director of sales for Bic Sports North America, after Fiberspar developed oil services composites tubing and spun off their sporting goods to Bic Int. A lifelong sailor, Jonathan has always been drawn to the ocean, watersports, and product development. He enjoys big boat racing, cruising, fishing, and even trying his hand at the new sport of foiling. GMT combines his professional and personal interests, where he looks forward putting his industry knowledge to use and build upon GMT's already stellar reputation. 

david schwartz - lead engineer

David brings a level of experience and expertise in custom carbon fiber manufacturing that is hard to match. As the former President/Owner of GMT, David joined the company in 1990, and was one of the first to prove that carbon sailboat spars were a safe and viable option. David earned an engineering degree from Brown University, and has applied his extensive knowledge of carbon composites to a huge variety of applications. Under his leadership, GMT developed a reputation for tackling unique and complex projects that other companies simply couldn't deliver. While stepping back from the day to day operations in 2016 to enjoy more sailing time, David is still very much involved, providing ongoing design and engineering services which is an invaluable resource for the company in developing future products and continuing to build to the highest standards.


Nate williams - director of sales and marketing

Nate joined GMT in 2018 with a strong background in the marine trades. He started on the program and education side of sailing as an instructor and 420 dinghy coach (US Sailing Level 3 Coach) while earning a degree in business from Saint Michael's College in VT. Nate joined the manufacturing side of the marine industry first as production manager for Kinder Industries, a marine canvas manufacturer in Bristol, RI. Before coming to GMT, Nate managed sales and marketing for Zim Sailing with their explosive growth in high performance small boat production and sales. Nate is very active in the big boat racing scene, and enjoys cruising as well in his family’s 1974 Pearson 10M. Nate has spent his lifetime on and around the water and enjoys sharing that passion with customers, colleagues, friends and family.

our technicians

While they prefer to stay behind the scenes, our technicians have spent their careers perfecting their craft and adapting their methods to use the latest techniques and materials available in custom composite manufacturing. Our shop foreman has been with GMT for close to 20 years, and many of our other technicians have been with us for as long if not longer. GMT and our customers have benefited from this steady core of craftsmen who are incredibly talented, and take pride in their work, delivering a superior finished product. 

join the team

GMT Composites is always looking for talented and passionate people to help us continue to set the standard for custom carbon marine and industrial manufacturing. We offer the opportunity to work on a variety of interesting projects, in a small and friendly shop atmosphere. We offer competitive salaries, flexible schedules, paid holidays and vacation, and benefits. For more information on specific opportunities, please send a resume and cover letter to

Current Job Openings - Shop technician

GMT Composites is hiring shop technicians to join our team.

This is a hands-on shop position for a person who is self-motivated, and has good general mechanical skills. As part of a small team, or sometimes on your own, you will be building custom composite parts ranging in size from 120 foot masts for sailboats to small paddles for testing semi-conductors. Most of these parts are made from carbon fiber which has been pre-impregnated with epoxy. After the parts are laminated, there is a significant amount of mechanical assembly that must be done. Through the neatness and accuracy of your work, you will be responsible for maintaining the high level of quality GMT is known for. Experience in composite construction techniques is a plus, however, we will train people with the right attitude.

To apply, please send a resume and cover letter to