Martin grew up in the small coastal town of Hermanus spent his childhood surfing, fishing and water-skiing. He started his career in yachting in 2002 aged 19, his first job taking him across the Atlantic to the Caribbean for the winter season and then back to the Mediterranean for the summer. It is safe to say his passion for the industry was born and he had found his career path. In the last 23 years Martin has circumnavigated the world twice and been to some incredible and remote places including Alaska, the Pacific and Northern Europe and has acquired a broad range of skills and knowledge of the ocean. During his time on board various yachts, he gradually made his way up the ranks and completed his Master 3000 in June of 2020. He then went on to Captain two vessels, Motor yacht Marina Wonder based in the Mediterranean and more recently Motor Yacht Calliope where he spent his time cruising both the Eastern Coast of America and exploring The Bahamian Islands.
In his spare time Martin likes to restore classic cars and bikes. He also enjoys outdoor pursuits such as camping in his off-road camping trailer with his wife and dogs.
Martin Raubenheimer
Captain
Tiaan grew up in a small town by the ocean and near the mountains, where hiking quickly became a favourite activity. A sailing trip a while back sparked an interest in the ocean, which eventually led to a career in the yachting industry. Even though this is his first yacht job, joining M/Y JeMaSa has been an exciting new chapter. One of the best moments onboard so far was heading out to sea for the first time. When not working, Tiaan is always chasing adventure, whether it’s skydiving, scuba diving, hiking, or exploring new places.
Tiaan Nel
Deck / Engineer
With five years of experience in the yachting industry, Harriet is a calm, organised, and detail-driven stewardess known for her impeccable standards and positive energy on board. She thrives on delivering top-tier service and takes pride in creating a welcoming, polished environment for guests and crew alike.
Harriet loves the ever-changing scenery that comes with life at sea—waking up in a new destination each day never gets old. She has cruised extensively through the Mediterranean and Caribbean, and is now thrilled to be exploring the South Pacific for the first time.
An adventurer at heart, Harriet makes the most of her time ashore with hiking, cycling, or horse-riding excursions—always on the lookout for her next great outdoor escape. But no matter how far she roams, one thing remains constant: her deep appreciation for a proper cup of Yorkshire tea. Wherever she is in the world, kettle on and teacup in hand is her favourite way to unwind.
Harriet Rixon-Brown
Stewardess
Jessica is originally from Port Elizabeth, a small coastal town in South Africa, and later immigrated to New Zealand with her family. Outside of her professional pursuits, Jessica competes internationally as a full-bore rifle shooter, proudly representing New Zealand.
Inspired by her father’s role as a sea rescuer and paramedic, Jessica developed an early interest in the maritime industry. After earning a Bachelor’s degree in Commerce and gaining a year of experience in the corporate world, she chose to pursue a more adventurous career path in yachting.
In early 2024, Jessica joined M/Y JeMaSa. During a shipyard period, she has taken the opportunity to learn the intricacies of the stewardess role from her fellow crew members, furthering her skills and commitment to her role.
Jessica Riddle
Stewardess
With more than 25 years at sea and a toolkit that’s seen it all, Renato Dzono is a true powerhouse in the engine room. Starting his career in the merchant navy, Renato made the leap into luxury yachting over two decades ago—and hasn’t looked back since.
Renowned for his hands-on approach and deep technical expertise, Renato’s calm, can-do attitude keeps things running smoothly below deck, no matter what challenges arise. He’s been the lead engineer on two new builds, taking yachts from blueprint to open water with precision, care, and an eye for flawless performance.
Whether it’s fine-tuning propulsion systems or managing preventative maintenance like clockwork, Renato is all about operational excellence and team spirit. Off duty, you’ll find him reeling in the catch of the day, smashing forehands on the tennis court, or diving into local culture wherever the yacht drops anchor.
Solid, dependable, and endlessly experienced—Renato is the quiet force that keeps the show on the road.
Renato Dzono
Chief engineer
Meet Shaun Bray, a powerhouse of hands-on expertise with a no-nonsense attitude and over seven years of experience keeping yachts running smoothly at sea. Before swapping spanners for sea spray, Shaun spent nearly two decades in automotive body repairs, welded stainless steel like a pro, and even tackled the high-pressure world of oil and gas. In short — if it’s broken, Shaun can fix it.
Shaun’s been the go-to guy aboard explorer yacht Plan B (now JeMaSa), where he brought his A-game to all things mechanical and operational. From precision welding to preventative maintenance, his cool-headed approach and deep technical know-how make him a vital part of the engine room.
Off-duty? Shaun’s all about adrenaline — whether he’s carving waves on a surfboard, diving deep with a speargun, or conquering trails on his enduro bike. A true team player with a knack for problem-solving under pressure, Shaun is the kind of engineer who gets the job done — and has fun doing it.
Bringing bold flavours and a love for life to the galley, Chef Timothy MacDonald is a culinary force with over 15 years of experience creating standout dishes aboard private and charter yachts. With a solid foundation in restaurant kitchens across Melbourne and London, Tim made the leap into yachting to combine two passions: food and far-flung travel.
Tim’s cuisine is vibrant, healthy, and globally inspired – think macrobiotic meets Ottolenghi, with an ever-changing menu that’s as nourishing as it is beautiful. A former winner of the Concours de Chefs at the Antigua Yacht Show, he’s at his happiest designing elevated dishes for guests from around the world, especially when it means keeping families smiling on charter.
His time on standout yachts like M/Y Elixir has taken him from the Med to the tropics, but his soul always returns to Thailand – his favourite place on Earth – where he unwinds with his young family on Koh Samui.
From mastering Russian, American, and Asian flavours to handling high-pressure charters solo, Tim brings world-class skill with a relaxed Aussie vibe. Whether you’re after clean, health-focused plates or a globe-trotting tasting menu, he’s got you covered.
A fifth-generation farmer from the heart of Limpopo, South Africa, Joshua Du Plessis grew up with deep roots in farming. He spent many days harvesting Macadamia nuts and granadillas and maintaining the game farm. Josh is an avid sports and fitness enthusiast who has always kept in the outdoors, whether working on the land or pushing his physical limits.
After dedicating years to obtaining a medical law degree while gaining valuable work experience, Josh decided the standard office job would not fit him. Josh harboured a desire to work on the water, and he recognized that his farming background’s practical, hands-on nature closely aligned with the demands of life at sea. This awoke his true calling to be a seafarer.
With a strong work ethic and a commitment to going the extra mile, Josh is eager to embark on a new chapter of his maritime journey onboard M/Y JeMaSa. Josh is known as the “chief Morale officer” among the crew, consistently boosting everyone's spirits—a quality that seamlessly translates into providing an exceptional experience for guests onboard.
Joshua DuPlessis
Deckhand
With over 15 years of experience in the maritime industry, Tommi has worked on various vessels, including commercial cargo ships, sailing yachts, and motor yachts. He has had the privilege of serving the same family throughout the majority of his yachting career, starting with the first M/Y JeMaSa, followed by an impressive 13-year tenure aboard M/Y SuRi, and most recently returning to the new M/Y JeMaSa returning to the same family.
Throughout his career, Tommi has circumnavigated the globe five times and accumulated over 500,000 nautical miles. Whether maintaining the vessel's systems or solving complex technical challenges, Tommi consistently demonstrates a hands-on approach to keeping M/Y JeMaSa in top condition.
Besides getting his hands dirty and solving any engineering task thrown his way, Tommi’s other passions include being at home in Dubrovnik, Croatia, with this growing family and watching any football game on TV.
Tomislav (Tommi) Trojic
Chief engineer