GSF is a small and friendly business which has been able to quickly respond to changing markets and environments over the years. As a very small business, we all have to be able to take on a variety of roles and to work closely together. We get to know our customers and their situation, so that we can supply the best seed for them. We feel it is important, where we can, to meet our customers and see their sites and understand their individual challenges.
Directors
Josie and Tom returned to Guernsey in January 2026 to take on Guernsey Sea Farms, building on the legacy of Mark and Penny. Josie recently completed a PhD in marine biology studying corals on the Great Barrier Reef, while Tom brings a background in oceanography and swim coaching. Together, they are passionate about the marine environment and focused on growing GSF for the future.
NURSERY MANAGER
Scott has worked for GSF for over 25 years and runs the nursery, grading and preparing seed despatches for customers and takes great pride in the stock. He also carries our most of the maintenance work and has a special interest in wildlife.
Founder and CONSULTANT
Mark first got interested in oyster farming while studying Mechanical Engineering. He designed a lot of the equipment, including the ‘flupsy’ pontoon and highly efficient paddle wheel. He spends most of his time these days fixing things and trying to make improvements.
In 2026 he will be working part time while handing on his experience to Tom and Josie
Founder and CONSULTANT
Penny, studied Environmental Science and has an MSc in Management Science. She is in overall charge of production, sales and water testing. When not working, her interests are choral singing and sea swimming.