The Longevity Hunter (Shane) is focused on building scalable health, performance, and longevity ventures. With over 40 years’ experience, he operates at the intersection of athlete performance, preventative health, and longevity science—translating emerging innovations into investable, real-world solutions for private clients and family offices.

Amanda Barrett joined the business in 2019 and is an accomplished business development professional with a strong focus on building lasting partnerships and uncovering new growth opportunities. As Senior Business Development Manager, she works closely with brokers to understand their clients’ needs and deliver tailored solutions that drive value and long-term success, enabling her to make a meaningful and measurable impact on business growth.

With extensive experience in relationship management and strategic planning, Amanda is skilled at identifying emerging opportunities and turning them into measurable outcomes. Her proactive approach, commercial insight, and commitment to excellence make her a trusted partner to both clients and colleagues alike, consistently contributing to her strong track record of success.

Kieran Brown is Managing Director of SIP Medical Family Office UK, where he leads the firm's strategy, growth and regulatory responsibilities in the UK market. Having played a key role in establishing the UK business, he has overseen its development from a start-up operation into a thriving London-based team serving high-net-worth individuals, families and their advisers.

With more than two decades of experience across international health insurance, healthcare and client services, Kieran is widely respected throughout both the insurer and intermediary communities. He is passionate about bringing together expertise, innovation and trusted partnerships to deliver integrated healthcare solutions tailored to the evolving needs of affluent clients.

As a strong advocate for collaboration across the industry, Kieran is committed to advancing the Medical Family Office proposition and helping shape the future of private healthcare services and support.

At the beginning of his career, Kevin worked for Swiss Re in the large corporate direct insurance division called Swiss Re Corporate Solutions. A personal incident of medical malpractice has made him find his purpose in health management. Today, Kevin is the CEO at SIP Medical Family Office. For over 25 years, individuals, families, and companies have been relying on SIP’s expertise to protect their health around the world. Founded as an International Private Medical Insurance advisor, SIP has developed into what is today known as a Medical Family Office. Combining the expertise from private medical insurance with a holistic approach towards proactively planning one’s health, it has been SIP’s mission to protect people’s health since 1997.

While International Private Medical Insurance remains an important focus, SIP has developed a Medical Concierge proposition to plan people’s health strategically and ensure better outcomes in acute situations. This ranges from Privileged Healthcare to Preventive Medicine, Longevity, Medical Records Management, and more. 

Bryony advises some of the most prominent families and family offices in the UK and internationally, with nearly 30 years’ experience in cross-border private wealth and estate planning. Recognised as one of the UK’s leading private client lawyers, she works with multi-generational families, landed estates, and family offices to preserve wealth, manage succession, and design long-term governance structures that reflect both financial and personal priorities. Bryony also acts as trustee in a personal capacity for significant family businesses in the UK.

Her practice has a particular focus on how technical solutions can be dovetailed with human dilemmas and family relationships. She also supports single and multi-family offices on structuring, philanthropy, and reputation management alongside complementary legal practice teams at Farrer & Co.

Thibault Demoures is an experienced healthcare executive with over 15 years of leadership in insurance, health solutions, and market expansion. As the Global Head of the Individual Segment at AXA Global Healthcare, focusing on growth strategies and tailored customer solutions. He has a proven track record in driving market development, forging strategic partnerships, and enhancing customer experiences across Asia and Europe. With expertise in business development, healthcare journeys, and cross-functional collaboration, he is passionate about transforming healthcare services. Fluent in French, English, and conversational German, Spanish and Chinese, he holds advanced degrees from Tongji University and Euromed Marseille. 

Lindsey Frances is a Leadership & Wealth Psychologist, legacy advisor and creator of The Conscious Change Method™. For over 20 years she has worked with UHNW CEOs, founders and their teams who appear to have it all yet feel stuck, restless or quietly exhausted. She combines psychology, sophrology and real-time biometric data to help leaders overcome burnout and self-sabotaging patterns and build legacies that go beyond wealth. Lindsey is also a clinical sophrologist, Ironman 70.3 athlete and host of the Rich Simple Human podcast. 

Having spent over 30 years in the financial services industry, Adam has an impeccable track record in multi-jurisdictional client service. He works with ultra-high net worth families around the world to find the most secure financial structures. 

Adam qualified with the Institute of Financial Services and is a member of the Society of Trust and Estate Practitioner (STEP). 

 Adam specialises in UK non-domicile clients, Asian, CIS, and Indian families and is a specialist in protective family office structures and dynastic planning, and strongly believes in the value of long term relationships and goals within the wealth planning environment. 
 
 Since 2012 he has been recognised as a leading figure in the trust industry by Citywealth and included in the Trustee honours list. Adam was recognised by ‘Global Elite Recommends’ category within the directory, allowing lawyers to nominate their most highly-rated partners including accountants, asset managers, family offices and trustees.

Alex Gray is an internationally renowned live MC and television host, recognised for her versatility across a wide range of sectors, including sport, health, finance, and lifestyle. Her presenting work has seen her host for prestigious names such as the BBC, Henley & Partners, QVC, and Red Bull.

Alongside her broadcasting and live hosting career, Alex has become a respected voice within the autoimmune community, speaking at events including the Allergen and Free From Show and the Genesis Health Conference. After appearing as a contestant on the BBC hit show The Traitors, she has also developed a series of talks on the psychology of lying, informed by both her first-hand experience on the programme and her academic training in psychology.

Alex grew up in Cambridge and graduated from University College London with a first-class BSc in Psychology. 

Tom Hienckes is the Commercial Manager at European Air Ambulance (EAA), where he oversees customer relations, account management, and commercial support for the company's air ambulance fleet. An aviation enthusiast who studied Aviation Management, Tom began his career with a global business aviation operator, gaining valuable experience across both commercial and operational functions in Luxembourg and the United Kingdom.

Combining a customer-focused approach with a strong operational understanding, he plays a key role in supporting EAA’s patient-centred mission of delivering high-quality air ambulance services worldwide. Fluent in Luxembourgish, German, French, and English, Tom fosters strong partnerships across the international air ambulance, assistance, and travel insurance sectors.

Mark Jackson is the Founder and CEO of Vitaspan, a health-data infrastructure platform designed to unify fragmented medical records into a structured longitudinal health record. Vitaspan enables clinics, physicians, and patients to access a complete health picture while supporting AI-driven risk prediction for preventative medicine. Mark spent more than two decades in global technology leadership, including senior roles at Thomson Reuters, where he built large-scale strategic partnerships with firms such as Microsoft, IBM, and Oracle. His work with Vitaspan focuses on solving one of healthcare’s most persistent problems: the fragmentation of medical data across countries, providers, and systems. This challenge is particularly acute for internationally mobile families.

Mark’s mission is to give individuals true ownership of their health information while enabling physicians to deliver more proactive and personalised care.

Dr Paul Jarman is Chair of the Department of Neurology and Neuro-rehabilitation at Cleveland Clinic London. In this role he leads a large team of world-class neurologists, neuro-rehabilitation specialists and neurophysiologists. He is also a senior consultant neurologist at the National Hospital for Neurology and Neurosurgery in Queen Square and University College Hospital London.

He completed medical training at Oxford University and UCL, where he graduated with honours. He also completed a period of training at UCLA medical centre in the USA. His research background includes a PhD at the Institute of Neurology UCL, on the subject of molecular genetics of neurological disorders. This work included mapping new disease genes and identification of novel mutations in genes for movement disorders.

He is a clinical neurologist with interests in all aspects of neurology and brain disorders, including specialist interests in movement disorders including Parkinson’s disease and in headache and migraine, Botox treatment and acute neurology.

He is committed to medical education and training the next generation of neurologists and has for many years been the Training Programme Director for the London postgraduate neurology training programme and he chairs the Pan-London neurology Specialist Training Committee.

During the Covid-19 pandemic he chaired the AstraZeneca Covid-19 vaccine neurology committee, helping with the safety assessment of the Covid-19 vaccine.

He has published several scientific papers on various neurological topics and is author of several textbook chapters. He is also a keen marathon runner.

Chantal comes from a family with a long-standing background in insurance, giving her an early understanding of the importance of protecting individuals, families, and businesses against unforeseen risks. With a French-English background, she brings an international perspective to advising clients on their healthcare and insurance needs.

With more than 10 years of experience in the health insurance industry, Chantal is a specialist in International Private Medical Insurance (IPMI) as well as UK Private Medical Insurance (PMI). Throughout her career, she has advised both private clients and small and medium-sized businesses, helping them navigate an increasingly complex healthcare and insurance landscape.

Today, Chantal supports clients in identifying and implementing medical insurance solutions tailored to their individual circumstances. Combining in-depth market knowledge with a strong understanding of both international and UK healthcare systems, she helps clients secure appropriate healthcare access and protection, whether they are based in the UK or living and working internationally.

E. Marco Liardo is the Head and Managing Director for Switzerland and the Americas at Charles Monat Associates. In this role, he leads the development and delivery of highly personalized liquidity planning solutions, working closely with sophisticated private clients to help them preserve, protect, and grow their wealth across generations. 

Marco also mentors his sales consultant teams in Switzerland and the Americas, fostering a high performance culture rooted in integrity and client focus. He manages a continuously growing network of trusted referral partners, cultivating long-term relationships. Marco is an appointed member of the Global Advisory Council, which reports directly to the Group Executive Committee. In this capacity, he contributes to shaping the firm’s strategic response to the evolving landscape of global wealth management. 
With 25 years of experience advising UHNW/HNW clients, Marco brings a deep understanding of both the technical aspects of insurance and the nuances of private banking. Prior to joining Charles Monat Associates, he successfully built and led the Swiss hub of another international life insurance brokerage firm. He also held a senior role in Private Banking Life Insurance, at a global Swiss private bank, where he led the launch and implementation of the bank’s life insurance referral platform in Switzerland. Earlier in his career, Marco served as Head of Financial Analysis and Senior M&A Manager at a leading global insurance group. 
Marco’s combined expertise in insurance structuring and private banking uniquely positions him to deliver exceptional succession planning advice to clients and banking partners alike. 
He holds a Master’s degree in Finance and Capital Markets from the University of Basel, Switzerland.

Steve Martin has been in the Global Health Insurance Industry for more than 25 years, working for some of the largest companies in the industry. Steve has held various different positions in different regions throughout the world. He has worked for Cigna Healthcare for 10 years now and has significantly grown the Cigna Healthcare Global Individual Health business throughout Europe and the UK with key Broker Partners. Steve lives in Manchester, UK with his wife and 2 children. He is a keen golfer and cyclist (when he gets time!) and enjoys taking his children to their various sports activities at the weekend. 

Todd McAllister, PhD, is widely regarded as one of the original architects of Longevity Medicine and a leading visionary in the transformation of modern healthcare. A scientist, entrepreneur, and systems thinker, his work has helped shift medicine from a reactive, disease-centered model to a proactive, data-driven discipline focused on extending healthspan, performance, and functional longevity. 

Over the past 25 years, Dr. McAllister has founded, scaled, and advised companies at the forefront of preventive and regenerative healthcare. He was the co-founder and CEO of Fountain Life, alongside Tony Robbins and Peter Diamandis—one of the first companies globally to focus explicitly on proactive, prevention-based care rather than episodic disease treatment. At Fountain Life, Dr. McAllister designed and operationalized what has become the foundational clinical framework for longevity medicine, organizing care around three core pillars: Precision Diagnostics, Performance Optimization, and Advanced Therapeutics. This integrated model established the clinical focus on healthspan over lifespan and continues to define the approach used by longevity clinics worldwide. 

Following Fountain Life, Dr. McAllister partnered with ProMedica Health System, the 14th largest healthcare system in the United States, to build and operate the Icaria Longevity Center. This initiative embedded proactive longevity care within a traditional primary care environment, demonstrating how advanced prevention models could scale within large healthcare systems and helping bring longevity medicine closer to the mainstream. 

Dr. McAllister also brings exceptional scientific credibility to the field. His pioneering work in cell-based therapies was recognized by Scientific American as one of the Top 50 achievements in science, business, and policy, and he is a two-time finalist for the NIH Pioneer Award. His research has been widely published in top-tier journals, including The New England Journal of Medicine, Lancet, Nature Medicine, and Science, contributing to the clinical understanding of regenerative therapies, translational medicine, and the biology of aging. 

Most recently Dr. McAllister co-founded Skai Health, a network of concierge primary care clinics in the UK and Middle East. As Skai’s Founding Scientist, he continues his mission to translate complex biological data into clear, actionable care—turning early insight into lasting health.

PD Dr. med. Joachim Mertens, FEBGH, is a specialist in gastroenterology, hepatology and internal medicine at GastroZentrum Hirslanden in Zurich, Clinical Associate Professor at the University of Nicosia Medical School, and Visiting Professor at the Norwegian PSC Research Center Oslo University.

Before joining GastroZentrum Hirslanden, he spent over 15 years at University Hospital Zurich, where he served as Senior Physician in Gastroenterology and Hepatology, led the Hepatology Research Group and headed the interdisciplinary liver tumour clinic. He has published numerous research articles in international top journals.

His international training and academic career include a fellowship at the Mayo Clinic in Rochester, USA, a visiting professorship at the Norwegian PSC Research Center at the University of Oslo, and further specialist training at Augusta University Medical Center in the United States.

His clinical expertise covers gastrointestinal, liver and pancreatic diseases, with particular expertise in liver disease, liver tumours and advanced diagnostic procedures. Dr. Mertens is actively involved in clinical research and is a member of several leading Swiss and international medical societies.

Dr Anthony Renshaw acts as chief medical officer to numerous global organisations, advising on public health, remote healthcare, crisis management, pandemic planning and corporate health. Since joining International SOS in 2008, he has consulted widely across Europe, Africa and Asia-Pacific, and has overseen health service delivery platforms in both remote and urban health settings across the world including China, Mongolia, Russia, Korea, Japan, Australia and Papua New Guinea, working across a range of industrial clients and government agencies from prisons to defence. Through this, he has developed a keen interest in the interplay between global health and private sector. 

Anthony previously worked as a surgeon in the UK and South Africa. He is a Founding Fellow of the Faculty of Medical Leadership and Management; a Fellow of the Royal Society for Public Health; a Member of the Royal College of Surgeons of Edinburgh and Fellow of its Faculty of Rural, Remote and Humanitarian Healthcare, where he is an advisory board member. He holds a Masters in Global Health Policy from London School of Hygiene and Tropical Medicine and an Executive MBA from INSEAD in Fontainebleau. He read medicine at the University of Manchester, where he also holds bachelor degrees in immunology and oncology. He holds a doctorate in surgery from UCL, where he is a Health Executive-in Residence at the Global Business School for Health.

Johan Sorensen is the Founder of Portobello Behavioural Health and Director and Co-Owner of Cardinal Clinic. He brings more than 25 years of experience in mental health and addiction, with extensive expertise in the development and leadership of treatment facilities and programmes across the UK, the Middle East and the USA.

Originally trained as a therapist, Johan has worked across the full spectrum of service delivery and has held positions on a number of charitable boards. He has also provided expert commentary to the media on mental health and addiction. Johan founded Portobello Behavioural Health with a vision of delivering highly personalised, integrated support for individuals, families and organisations across the continuum of care. As Director and Co-Owner of Cardinal Clinic, he is committed to the delivery of high-quality, person-centred behavioural healthcare.

Basak is Managing Director of Virtusan, a Swiss health technology company building a new approach to personalised health and longevity. Virtusan is the first platform to connect what your body measures, what science recommends, and the environments you live in—bringing these inputs together in one integrated system designed to help people live longer, healthier, and better lives. By transforming biometric data from wearables into personalised, science-based health recommendations, Virtusan helps individuals turn everyday data into meaningful actions.

Previously, Basak held leadership roles at Ricardo, Switzerland’s largest online marketplace, where she led business development, data intelligence, and product teams. Based in London, she also led Tripadvisor’s vacation rentals product team across Europe. Earlier in her career, she served as CEO of a UK ticketing start-up and built Google’s commercial operations across Eastern Europe, the Middle East, and Africa.

Basak began her career as a management consultant at Kearney. She holds a degree in Electrical Engineering and an MBA from the Massachusetts Institute of Technology (MIT).

Matt Teumer is Co-Founder & President of Acclaim, the payment operating system for global insurers. He has spent more than 15 years at the intersection of fintech, payments and international insurance, working with carriers, MGAs and TPAs on premium collection, claims disbursement and commission payouts across borders. At Acclaim he leads go-to-market and partnership development for a platform that reaches more than 200 countries and 90 currencies through local payment rails. His focus is the part of insurers and their customers actually feel — whether the money arrives quickly, in the right currency, and in a way that reflects the promise the policy made.

With a Bachelor’s degree in Physical Therapy, Léa specialised in orthopedic and neurological rehabilitation. She began her career in an independent practice, focusing on restoring function and improving quality of life through tailored rehabilitation programs.

She joined Swiss Medical Network in 2017, a leading private medical group in Switzerland, where she initiated and led the development of a rehabilitation application designed to enhance and accelerate recovery following surgery or injury, including complex neurological conditions. She later advanced into the role of International Medical Coordinator, managing and coordinating medical treatments for an international clientele, ensuring a seamless and high-quality care experience.

Now part of SIP Medical Family Office, Léa is dedicated to expanding global access to premium healthcare solutions, driven by her passion for patient wellbeing and excellence in medical services.

Stuart Wakeling is a Managing Partner at Henley & Partners and Head of the firm’s London and Africa offices. He has almost 10 years of experience in the investment migration sector, building on 13 successful years in private banking at Coutts and HSBC.

With 19 years of relevant experience, Stuart advises high- and ultra-high-net-worth individuals, identifying and managing risk while seeking value-creating opportunities across multiple jurisdictions, including those with challenging environments. He brings significant global experience, with a particular focus on Nigeria and the wider West African markets. Known for his hands-on approach, Stuart is always willing to assist new clients, is a strong international networker, and is currently leading the establishment of Henley & Partners’ enhanced Nigerian–West African operations.

Teresa Wighton took up the role of Commercial Director at William Russell in November 2024. With nearly 31 years of experience in the international health insurance industry, Teresa has a proven track record of building high-performing sales teams and driving business growth. She has held senior sales leadership roles at Cigna, Aviva, and Bupa Global, where she spearheaded B2B expansion and led a major sales transformation program.

As Commercial Director at William Russell, Teresa’s focused on expanding our global business, strengthening relationships with key broker partners, and ensuring our direct-to-business segment continues to thrive. She works closely with our underwriting and marketing teams to maintain a balance between growth and long-term sustainability. A passionate leader, she’s committed to fostering a workplace where people feel empowered and engaged - an approach that helped her achieve record-breaking employee engagement scores in a previous role. 

Since joining, Teresa’s energy and ambition is clearly evident. Both as we continue to drive the huge success of our 30-year + history and, as we focus for our next chapter, driving forward our growth ambitions in the international health and protection space and our continued success. 

Beyond work, Teresa certainly enjoys a challenge. She once walked the entire 100-mile South Downs Way in just 6.5 days, studied wine to diploma level with the Wine & Spirit Education Trust (a self-proclaimed “qualified wine snob”), and even braved a zip wire from St Paul’s Cathedral for charity.

William Russell is a UK-based company formed in 1992 to provide international health insurance to individual expatriates in 160 countries. Our plans are underwritten by AWP Health and Life SA, part of the Allianz group of companies.