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Hmsa

Family office

London · 17 people tracked

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Investment thesis

HMSA Group is a corporate services provider offering bespoke tax planning, corporate structuring, trust administration and related services to international clients through offices in the UK, Switzerland, Hong Kong, New Zealand and elsewhere.

Invests inSector AgnosticHong KongLondonSwitzerlandUnited Kingdom

Source: firm website, verified Aug 3, 2026.

HQ
London, CH
Instruments
Equity
Founded
2013

Team · 17 people

from the firm's website
Geoff Melamet· CEO

Founder and CEO of HMSA, focused on corporate services, tax planning and cross-border trust structuring. Previously worked in trade finance and began his career in stockbroking on the Johannesburg Stock Exchange; holds a degree in Economic Science and an MBA from the University of the Witwatersrand.

Marc Pimstein· Account Executive Director / CFO

Founding partner of HMSA leading international business development and accounting functions. Formerly with KPMG and COO of a boutique trust administration company; holds a Business Science degree and postgraduate diploma from the University of Cape Town.

Christa Maria Schanz· Business & Account Executive

Joined HMSA in 2022; a private banking and family office executive with experience serving US and European UHNW clients. Previously held senior roles at Pictet North America Advisors and Heritage & Partners, and spent 20 years at major banks in New York.

Eric Hohberger· Director

Director who has worked with HMSA since inception, with expertise in corporate consulting, management, audit, due diligence and company valuation. A Swiss national, University of Geneva economics graduate and Swiss Chartered Accountant.

Jackie Barton· Office Manager

Joined HMSA in 2015 and is responsible for the running of the London office and supporting the directors.

Jessica Rey· Junior Trust Officer & Accounting Assistant

Joined HMSA in 2016 and handles client data administration, account openings, compliance/KYC reviews and internal Swiss accounting. Holds an MBA in International Finance and is pursuing a Swiss financial accounting certification.

Jonathan Melamet· Director HMSA Ireland & Account Executive

Joined HMSA in 2013 and directs HMSA's Corporate Services (Irl) Limited while acting as an account executive, providing bookkeeping and administrative services for trusts and companies.

Jules Urdang· South African Representative – Account Executive

Joined HMSA in 2017 as South African representative and account executive after 25 years in corporate treasury roles. Has served as a trustee of various pension funds and administered a family office and family trust.

Julian Walsh· Hong Kong Representative & Resident Director

HMSA's Hong Kong representative and resident director since inception. A Cambridge graduate and chartered accountant based in Hong Kong since 1983.

Lee Thistlethwaite· Independent Advisor to HMSA

Independent advisor to wealthy families on risk management, succession planning and governance. Spent over 30 years in international and private banking, including 25 years at JP Morgan.

Magali Le Quellenec-Rault· Head Of Geneva Office, Trust Officer & Executive Manager

Experienced in administration of companies and trusts, client onboarding and office management. Educated in France and pursuing Swiss accounting and STEP courses.

Melina Dimitrakakis· Compliance HMSA SARL

Compliance and risk officer for HMSA since 2022, with a background in anti-money laundering and compliance leadership at Swiss banks. Founded Swiss Compliance Services in 2018 and holds a Masters in Law from the University of Geneva.

Prieur du Plessis· Advisory Board Member

Advisory board member since HMSA's inception and CEO of Plexus Holdings. Holds several non-executive board positions in South Africa and is an honorary professor at the University of Stellenbosch Business School.

Reuben Anstock· Resident Director – BVI

Qualified lawyer and STEP-certified estate and trust specialist with over 15 years' professional services experience. Based in the BVI and holds various board positions across multiple industries.

Roger Thomson· New Zealand Representative & Resident Director

HMSA's New Zealand representative and resident director since inception. A chartered accountant and lawyer with extensive trust and taxation experience and a member of STEP and CAANZ.

Steve Middleton· Compliance HMSA UK

Compliance and risk officer for HMSA UK since 2022, with over 20 years in financial services. Formerly Chief Administration Officer of Global Markets UK and COO of BNP Paribas UK.

Susi Schmidt· Internal System and Processes Officer

Joined HMSA in June 2025 to handle internal systems and processes, UK compliance and client onboarding. Previously worked in private banking, hedge fund rating and property.

Principals & officers · per Companies House

what is this? ⓘ
Dirk Prieur Du Plessis

Director · South African · since 2020

Geoffrey Hugh Melamet

Director · British · since 2013

Ownership & control

Geoffrey Hugh Malametsignificant influence or control

Frequently asked questions

What sectors does Hmsa focus on?
Hmsa focuses on Sector Agnostic.
Where is Hmsa located?
Hmsa is headquartered in London, CH.

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