CAPTAIN
Kosmas Rafael Sotiris - Greek
Languages: Greek, English, French
Rafael grew up in Athens, Greece and learnt to sail from an early age. In
2010 he joined the MT Olympic Flair, as an Apprentice Officer. He spent 4
seasons in Tankers and in the summer of 2016, he began his yachting
career on a 54metre yacht as 2nd Officer, working on various yachts in
different positions, ultimately gaining his Class Certificate of Competency
– STCW ’78 Merchant Marine Academy of Hydra Ministry of Shipping in
early 2016. Since then, he has commanded yachts until 54metres in
varying parts of the world, such as Aegean, Ionian and Adriatic Sea. He is
energetic and hard-working, loves the sea and will make sure that the
guests will have a safe trip and greatest satisfaction.

CHIEF ENGINEER
Giannis Papasotiriou- Greek
Languages: Greek, English

Giannis is a highly skilled Chief Engineer with over 12 years of hands-on experience in the maritime industry, including extensive service aboard luxury yachts. Holding a Class A’ Engineer’s License and supported by a strong academic and technical background, he possesses in-depth knowledge of the operation, maintenance, and troubleshooting of all onboard engineering systems.
Renowned for his methodical approach, leadership skills, and unwavering commitment to safety and efficiency, Giannis ensures smooth, reliable, and seamless technical operations throughout every voyage. He understands the importance of teamwork onboard and firmly believes that collaboration among crew members is essential to delivering a successful charter experience.
With a keen eye for detail and a proactive mindset, Giannis consistently maintains the yacht to the highest standards, contributing significantly to the comfort, safety, and overall satisfaction of guests.


CHEF
Kaliakatsos Georgios – Greek
Languages: Greek, English

Chef Georgios comes originally from Peiraeus, Greece. His passion
for food came around 8 years ago, when he attended a Masterclass of
the Greek Mediterranean Cuisine. Quickly inspired by the quality and
taste of fresh produce he continued his trainings by doing Masteclass
Thermomix, Roner and Siphon in 2015 and in early 2020 he attended
Masterclass Sous Vide. He started his career to the Grand Resort
Lagonissi, to develop his skills. From there George left Athens and
moved to a resort in Samos. In 2017, he continued his career for 1
year in Germany in Meze Academie as a Chef de Partier. Soon, he
returned to Greece to work as a Chef in a Resort in Mykonos. The
yachting industry came to his life in 2020, when he took over as Chef
for M / Y Alexander and the following year for M / Y Tourama.
George always aims to please his customers. He goes above and
beyond expectations, in order to the Estia Poseidon’s guests have the
most enjoyable culinary experience whilst onboard.
Chef George is determined that he wants to continue his career in the
yachting industry and his objective is to satisfy culinary desires,
embrace local produce, and provide guests with the highest level of
cuisine. When he is not cooking, he loves playing football and tennis
and he enjoys a lot travelling and discovering new destinations.


STEWARDESS
Nikoletta Roupaka - Greek
Languages: Greek, English

Nikoletta Roupaka is a dedicated and experienced yachting professional with a strong background in hospitality and guest service. Having served as a stewardess on luxury yachts ranging from 27m to 46m, she has developed exceptional skills in silver service, housekeeping, mooring operations, and general vessel maintenance.
Holding essential certifications, including STCW-95 and a Greek Seaman’s Book, Nikoletta is fully prepared for the high standards and demands of the yachting industry. She is organized, self-motivated, and detail-oriented, thriving in team-oriented environments while also performing confidently in independent roles.
Her passion for delivering impeccable service, combined with her positive attitude and strong work ethic, ensures that every guest enjoys a comfortable and memorable experience onboard.
Nikoletta warmly welcomes you aboard M/Y Estia Poseidon and looks forward to contributing to an exceptional charter journey.


DECKHAND
Hannibal Villaret - Filipino
Languages: English

Villaret holds a Bachelor of Science & Marine Transportation since 2000
and has been working at sea since 2004. His 18-years previous
experience as Deckhand includes working on motor yachts from 22-118
meters. He started his Charter career at the Atlanta Golden Yachts in
2009 and since then, he never stopped sailing . As a member of our team,
he is highly motivated and performs within safety and quality guidelines
at all times.
Villaret’s nickname is Bhal and he is a very hard working and valuable
member of the crew that is much appreciated by our guests who find he
is a very amiable, easy going but attentive member of the 7Seas-
Maritime crew.