High Five

Captain: George Tsiamantanis

Captain George Tsiamantanis brings over a decade of professional yachting experience to High Five, combining extensive charter and private operations with a calm, confident leadership style. With strong management and communication skills developed through years at sea, he ensures smooth onboard operations and a safe, enjoyable experience for guests and crew alike. George’s technical knowledge is complemented by significant cruising expertise throughout the Aegean, Ionian, and Cretan Seas, as well as the wider Mediterranean and Atlantic, gained through numerous yacht deliveries. Detail-oriented and highly professional, he prides himself on adaptability, reliability, and creating memorable voyages tailored to each itinerary. He speak English and Greek.

Chef: Isaak Athanasiadis

Isaak was born in 1983 on the beautiful island of Crete, Greece. Passionate about gastronomy and hospitality, he began his culinary career in 2010, working in several hotels across Crete where he developed a strong foundation in Mediterranean cuisine and professional kitchen operations.
In 2014, Isaak advanced to the position of Sous Chef, and by 2017 he became Head Chef. Since then, he has worked in elegant restaurants across Crete, including the renowned Ntore Gastronomy & Symposia, where he refined his culinary style and his ability to deliver high-end dining experiences. Over the years, Isaak successfully transitioned into the yachting industry, bringing his passion for fine cuisine and hospitality on board luxury yachts.
Isaak’s cuisine is inspired by Greek and Mediterranean traditions, with a strong focus on fresh local ingredients and authentic regional recipes. At the same time, he is highly adaptable to international tastes and guest preferences, creating balanced menus that combine traditional flavors with modern international cuisine.
Throughout his career, Isaak has developed excellent organizational skills, adaptability to different guest preferences, and a strong team-oriented mentality, all of which make him a valuable member of any crew. His calm and professional character, combined with his culinary expertise, allow him to consistently provide high-quality service in demanding environments.
In addition to his culinary background, Isaak holds a Daily Skipper’s Diploma, Pool Lifeguard Certificate, Seaman’s Book, and Powerboat Diploma, making him a capable and versatile addition on board.
Isaak is a non-smoker and speaks very good English.

Stewardess: Romy Van Bortel

Romy is a motivated and guest-oriented Stewardess / Deckhand from Belgium, fluent in English, Dutch, and French, with immediate availability. With a strong background in hospitality, security, and onboard operations, she brings a positive attitude, professionalism, and excellent attention to detail to every role. Calm under pressure and highly adaptable, she is committed to creating a welcoming, safe, and enjoyable onboard experience for both guests and crew

Romy has experience on both sailing and motor yachts, working across interior and exterior departments. Her skills include housekeeping, laundry care, guest service, table setting, polishing, light meal preparation, inventory support, washdowns, line handling, watchkeeping, and general deck operations. She has supported yacht refit and boat show preparations onboard a 37m sailing yacht and has also worked as a Solo Stewardess / Deckhand on a 12m hybrid yacht, managing full interior duties, provisioning, Mediterranean mooring operations, and daily meal preparation. Combined with previous leadership experience in security and hospitality, Romy is a reliable, hardworking, and team-focused crew member with a hands-on approach and a strong passion for the yachting industry