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Stewart Southey

@stewartsouthey

Healthcare strategist and consultant anaesthesiologist at Yoffi, shaping an AI nutrition venture after NHS redesign captured £2m a year.

Cayman Islands
Message

What I'm looking for

I’m available for scoped advisory, clinical product and strategy engagements.

At Yoffi, I’m leading product definition, clinical framing and go-to-market for an AI nutrition and medical wellness venture, including nutrition support for blood-sugar management and weight-related goals. At Catena, I advise investors, startups and professional firms on emerging technology, delivered a blockchain consulting assignment for the World Health Organization, and built educational products sold in more than 35 countries.

In my NHS work, I led a clinical coding redesign that delivered £2m a year in recurring revenue capture and reconfigured day surgery theatres to deliver £400k in immediate savings and £250k a year in ongoing savings. As Chief Medical Officer and a founding-team member at Medicalchain, I helped raise $24m in its 2018 ICO and contributed to its whitepaper, pilot sites and partnerships.

Experience

Work history, roles, and key accomplishments

NO
Current

Consultant Anaesthesiologist

NovoClinic

Apr 2025 - Present (1 year 6 months)

Consultant anaesthesiologist providing clinical care at NovoClinic in the Cayman Islands.

YO
Current

Founder and CEO

Yoffi

Jan 2025 - Present (1 year 9 months)

Leading product definition, clinical framing and go-to-market for an AI nutrition and medical wellness venture, including nutrition support for blood-sugar management and weight-related goals.

CA
Current

Founder and Managing Director

Catena

Jan 2017 - Present (9 years 9 months)

Founded Catena Consulting through LANZ Ltd in the UK and continued advisory and education work through Catena MBA SEZC in Cayman from 2021. Advises investors, startups and professional firms on emerging technology, including a blockchain consulting assignment for the World Health Organization.

DH

Consultant Anaesthesiologist

Doctors Hospital

Jun 2021 - Feb 2025 (3 years 8 months)

Consultant anaesthesiologist providing clinical care at Doctors Hospital in the Cayman Islands.

UP

Independent Consultant Anaesthetist

UK NHS and private practice

Jun 2019 - Jan 2021 (1 year 7 months)

Independent consultant anaesthetist providing services to the UK NHS and private practice.

CC

Clinical Advisor

Candesic Strategy Consulting

Jan 2016 - Dec 2019 (3 years 11 months)

Provided clinical advisory input to strategy consulting work.

ME

Chief Medical Officer and Founding Team Member

Medicalchain

Jan 2017 - Dec 2018 (1 year 11 months)

Helped raise $24m in the 2018 ICO as part of the founding team. Contributed to the whitepaper and helped establish pilot sites and business and technical partnerships for blockchain health records.

Education

Degrees, certifications, and relevant coursework

University of Nicosia logoUN

University of Nicosia

Master of Science, Digital Currencies

2017 - 2019

Grade: GPA 3.7, Cum Laude

Completed an MSc in Digital Currencies with a GPA of 3.7 and Cum Laude distinction.

The Open University logoTU

The Open University

Master of Business Administration, Business Administration

2009 - 2015

Earned an MBA from The Open University.

Royal College of Anaesthetists logoRA

Royal College of Anaesthetists

FRCA, Anaesthesia

Awarded the Fellowship of the Royal College of Anaesthetists (FRCA).

University of the Witwatersrand logoUW

University of the Witwatersrand

MBBCh, Medicine

1993 - 1998

Completed the MBBCh medical degree from the University of the Witwatersrand.

Tech stack

Software and tools used professionally

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