Management Board / Partners

Josef U. Bollag

CEO / Partner

Josef Bollag worked for ten years as an asset manager at Credit Suisse, during which time he was also posted abroad in London and Paris. He then spent almost 20 years operating as an independent asset manager in Basel. In 2005 he joined Tareno Ltd as a partner. In 2007 he was appointed lead fund
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Jossi Hess


Jossi Hess has worked in banking for over 40 years. He gained his knowledge and skills at a number of different banks. After training as a forex and stock exchange dealer, he decided to specialise in asset management more than 30 years ago. Before joining Tareno Ltd as a partner in 2004, he co-owned an
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Daniel U. Unger

Head of Private Banking / Partner

Brought up in two different cultures – Swiss and Peruvian – Daniel U. Unger studied politics and history in Boston and Washington D.C. From 1996 he was a member of the management at UBS in various divisions of Wealth Management Latin America and Southern Europe. In 2004 he joined Tareno Ltd as a partner. He
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Sybille Wyss

CIO Chief Investment Officer

As Chief Investment Officer (CIO) and Chairman of the Investment Committee, Sybille Wyss is responsible for Tareno Ltd.’s investment policy and communications. She has been co-fund manager of the Tareno Global Water Solutions Fund since the launch of the fund in 2007 and fund manager since September 2018.
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Nicole Husmann

COO Chief Operating Officer

Nicole Husmann has worked in the financial industry for over 20 years. After studying economics at the University of Basel, she held several posts in Corporate & Institutional Clients at UBS. As a Director and Senior Relationship Manager, she looked after major corporate clients in the Northern Switzerland region.
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Urs Grossenbacher

CFO Chief Financial Officer

Urs Grossenbacher took over as Chief Financial Officer (CFO) of Tareno Ltd more than five years ago. He started his career with a commercial banking apprenticeship at the former Sparkasse Basel. He then worked for many years in various companies, where he acquired his well-founded expertise in
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Ronny Bachenheimer

Head of Private Banking Zurich

Ronny Bachenheimer has worked in banking for over 25 years. After a four-year trainee programme at Bank Julius Baer he worked in finance, including several years in private banking. For 12 years he held senior management posts at Banca del Gottardo in Zurich and at an independent asset management company. In 2012 he was appointed
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