Meet the people behind L&S Trust Services

Every subject matter expert shares the same dedication to excellence that makes us first choice, no matter how complex or challenging your fiduciary situation and objectives. Find out more about the experts ready to help you.

Leonard Vijverberg
L&S Trust Services SA (Geneva)
Leonard Vijverberg is a managing director of L&S Trust Services SA, a Swiss-regulated trust company owned by Lenz & Staehelin’s partners, and a counsel in the firm’s Private Client group based in Geneva. His practice includes advising private clients and their families on estate planning, succession, issues of international private law, international investment and corporate structures, as well as contract and commercial law. This often involves dealing with cross-border issues. Leonard also advises trust companies, charities and foundations on regulatory, as well as administration and litigation matters.
Alexander Greter
L&S Trust Services SA (Zurich)
Alexander Greter is a Lenz & Staehelin partner based in Zurich, where he advises banks and other financial services providers and fiduciaries, as well as Swiss and foreign private clients. His expertise lies in the areas of international trust law, regulation of financial products, financial services and financial institutions. This includes anti-money laundering regulation, as well as the automatic exchange of financial information such as FATCA and the Common Reporting Standard. Alexander also regularly advises on estate planning, matters concerning charitable foundations, tax law, and general commercial and corporate law.
Lucien Masmejan
L&S Trust Services SA (Geneva)
Dr. Lucien Masmejan is a Lenz & Staehelin partner who is considered a leading lawyer in private client matters in Switzerland. Head of the Private Clients group in Geneva and Lausanne, he chairs the board of L&S Trust Services SA. Lucien’s practice area has a broad scope including tax law and real estate, as well as general contractual and corporate matters. He regularly advises Swiss and international families, as well as privately owned companies and owners, including a number of high-net-worth individuals.
Heini Rüdisühli
L&S Trust Services SA (Zurich)
Heini Rüdisühli is a Lenz & Staehelin partner in the Zurich office, where he leads the Private Clients practice group. His main field of activity is national and international tax planning for private individuals, as well as the taxation of corporate reorganisations and acquisitions. Heini also specialises in inheritance law, succession planning and the executorship of estates. He has a broad knowledge of trusts.
Frédéric Neukomm
L&S Trust Services SA (Geneva)
Frédéric Neukomm is a Lenz & Staehelin partner and certified tax expert based at our Geneva office. His main areas of work are company tax law and tax law for high-net-worth individuals. Frédéric also works in the fields of banking and finance.
Fedor Poskriakov
L&S Trust Services SA (Geneva)
Fedor Poskriakov is a Lenz & Staehelin partner in the Banking and Finance group based in Geneva, where he specialises in banking, securities and finance law with a focus on Fintech. He regularly advises on regulatory, contractual and corporate matters. Fedor’s practice covers banking, investment management and alternative investments, including private equity and hedge funds. He also advises on complex asset structuring and protection for business and private assets. Other practice areas include compliance advisory, internal investigations and private clients.
Mark Barmes
L&S Trust Services SA (Geneva)
Mark Barmes studied Economics and Law at the University of Queensland, Brisbane, Australia and is qualified as a solicitor both in that jurisdiction (1987) and in England and Wales (1992). Geneva-based, he is a foreign solicitor registered with the Geneva Bar Association since 1990 and was made a partner of Lenz & Staehelin’s Private Client group in 1998. In 2022, Mark was appointed Senior Counsel primarily advising on trust-related matters. He contributes actively in the field of wealth planning in Switzerland through membership of and lecturing for the Society of Trust and Estate Practitioners (STEP), and also as a member of the Swiss Association of Trust Companies (SATC). Mark has twice served on the SATC management committee since 2007, supporting it in regulatory issues and trustee licencing in Switzerland.
Stefan Breitenstein
L&S Trust Services SA (Zurich)
Dr. Stefan Breitenstein is a Lenz & Staehelin senior counsel based in Zurich, where he has a broad private client, corporate, banking and finance practice. He regularly advises high-net-worth individuals, as well as families in relation to wealth, estate and tax planning. Stefan is Co-Chairman of the Zurich Bar Association's Banking Law practice group and was Lenz & Staehelin’s managing partner in Zurich from 2015 to 2021.
Robert Habin
L&S Services LP (Guernsey)
Robert Habin has been manager of L&S Services LP in Guernsey since 1st January 2021, first joining the company in 2020. He has considerable fiduciary experience having worked exclusively for trust companies in Guernsey since 1987. During this time he has developed a broad range of skills in varied roles including trust and company administration, business development, client accounting, software configuration and implementation, compliance, risk management and human resources. Robert is a member of the Society of Trust & Estate Practitioners (STEP) and a Fellow of the International Compliance Association (FICA) having completed the International Diploma in Trust Management and International Diploma in Compliance.