About Us
"Our team is committed to upholding the highest standards of professionalism, integrity, and dedication. We work closely with you to understand your unique needs, providing independent directorship services that align with your company's goals."
Christian Thompson
Managing Director

Christian brings a wealth of experience, spanning over 25 years, in Investment Management, Investment Banking & Accounting and Audit. He embarked on his career in technology-focused consultancy & audit at PWC and subsequently transitioned into banking roles in Fixed Income & Structured Products at Merrill Lynch and Deutsche Bank. In 2002, he ventured into Hedge Funds with Man Group (a UK Hedge Manager with Assets Under Management totaling $139 billion). There, he had oversight of Performance, Risk, and Operations for more than 100 emerging hedge fund managers as part of Man's "Managed Account" hedge fund platforms and managed Man’s outsourced fund servicing team overseeing valuations, administration and custody for over 1000 funds, including sitting as chair of Man Group’s Valuation Committee. After the global financial crisis in 2008, he co-managed a substantial multi-strategy illiquid hedge fund portfolio with distressed assets of $1.4 billion.
In 2012, Christian co-founded Brook Bay Capital, an Investment Management firm with offices located initially in London, before relocating to the British Virgin Islands, Ireland, and Jersey. In his role at Brook Bay, he serves as Principal and Co-Chief Investment Officer. He sits on the board of both Jersey & BVI Investment Management entities in the Brook Bay group.
In 2019, Christian expanded his professional portfolio with the establishment of Mount Sage Advisors. Christian holds non executive directorship and sub-advisory positions within Mount Sage Advisors, including:
- Chairman and sub-advisor of HK Quant & Global Macro Fund Manager.
- Chairman and advisor of UK/Japanese Multi-Strat Fund Manager.
- Chairman of Cayman based digital asset execution platform.
- In addition to his roles at Brook Bay and Mount Sage Advisors, Christian currently serves as a Member of the Securities, Investment Business, and Mutual Funds Advisory Committee to the BVI FSC, known as "SIBAC".
Sjoerd Koster
Managing Director

With over 25 years of experience in the financial services sector, Sjoerd is a trusted advisor to a substantial client base of international high-net-worth individuals. He also collaborates closely with law firms, trust companies, insolvency practitioners, and asset managers. His core competencies encompass various aspects of the financial industry, including credit business, investment activities, regulatory compliance, legal, tax, and business development.
Sjoerd served as the General Manager-Client Business and was a key member of the Executive Management team at VP Bank (BVI) Ltd, a subsidiary of a private bank listed on the Swiss exchange (SIX). This subsidiary is regulated by the BVI Financial Services Commission (FSC) with a General Banking License (GBL) and a Securities and Investment Business License (SIBA). Over a span of 13 years, Sjoerd played a pivotal role in overseeing client business and strategy, ensuring strict compliance with both group and local regulations.
Sjoerd also acted as the bank's authorized representative to the BVI FSC, managing various critical functions, including quarterly regulatory submissions, internal and external audits, and AML (Anti-Money Laundering) and operational risk management. Throughout his career, he has excelled in building and maintaining strong relationships with clients, regulators, and industry partners across diverse regions and markets. Sjoerd is a strategic thinker with a client-centric approach, deeply committed to understanding and meeting clients' needs.
Sjoerd is a permanent resident of the British Virgin Islands. He has held significant positions, including being the former President of the BVI Bank Association (BVI BA) and the former Deputy Chairman of the Association of Registered Agents (ARA) in the British Virgin Islands. His contributions have extended to serving as a member on various Government-appointed boards, such as the Financial Services FinTech Advisory Group, the Economic Advisory Council to the Premier (EAC) of the Virgin Islands, and the Sub-Committee to Revitalize BVI Financial Services.
christian@mountsageadvisors.com
+1 (284) 342 5300
sjoerd.koster@mountsageadvisors.com
+1 (284) 346 7769