Board of Directors Details
Gabrielle Nater-Bass
Member of the Board of Directors
1968, Meilen
Position
Member of the Board of Directors, independent member since 2019
Committees
Chairwoman of the Nomination and Compensation Committee
Education
Lic. iur., University of Zurich; admitted to the Zurich bar; LL.M., University of Virginia School of Law, USA
Professional activity
Gabrielle Nater-Bass has been working for Homburger, a leading Swiss corporate law firm, since 1997. She became a partner in 2006. She has many years’ experience conducting proceedings before national courts and courts of arbitration, both in Switzerland and abroad. As a member of Homburger’s specialist real estate team, she has extensive knowledge of infrastructure projects and real estate transactions.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: none
Unlisted companies: Member of the Board of Directors of Homburger AG, Zurich; Member of the Board of Directors of LGT Bank AG and LGT Bank (Schweiz) AG; Member of the Board of Directors of the Swiss Arbitration Centre AG
Key skills
Legal, M&A, Risk Management, Strategy, IT/Cyber Security, Human Resources
Florian Hauber
Head Group Treasury & Investor Relations
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Ton Büchner
Chairman of the Board of Directors
1965, Altendorf
Position
Chairman of the Board of Directors, independent member since 2020
Committees
Chairman of the Sustainability Committee
Education
Master of Science in Civil Engineering, Delft University of Technology, the Netherlands;
Master of Business Administration, IMD Lausanne, Switzerland
Professional activity
From 1989 to 1993, Ton Büchner worked as an offshore construction project manager in Europe and Asia. From 1994 to 2017, he worked for Sulzer AG, which is listed on the stock exchange, and was its CEO from 2007 to 2011. From 2012 up to and including 2017, he was CEO and Chairman of the Management Board at AkzoNobel NV, a Dutch company listed on the stock exchange.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Member of the Board of Directors of Novartis AG, Basel; Chairman of the Board of Directors of Burckhardt Compression AG, Winterthur
Unlisted companies: Consultant to Ammega; member of Adviescommissie Maatwerkafspraken Verduurzaming Industry (AMVI), Ministry of Economic Affairs and Climate Policy, Netherlands
Key skills
Leadership, Strategy, ESG, Sales & Marketing, Operation, M&A, Risk Management, R&D, Digitalisation, Finance, IT/Cyber Security, Regulatory Requirements
Anastasius Tschopp
Chief Executive Officer – Swiss Prime Site Solutions
1979, Hünenberg
«Change is inevitable! Let us use it.»
Position
Member of the Executive Board, CEO Swiss Prime Site Solutions and Deputy CEO Swiss Prime Site Group
Education
Master in Real Estate Management and Master in Banking and Finance from Zurich University of Applied Sciences in Business Administration
Professional activity
Chief Executive Officer of Swiss Prime Site Solutions AG since 1 May 2018 and member of the Executive Board of Swiss Prime Site AG since 1 January 2021. Anastasius Tschopp has worked at the Swiss Prime Site Group since 2014 - most recently as Head of Portfolio Management and a member of the Management Board of Swiss Prime Site Immobilien AG, where he shaped a portfolio worth CHF 10 billion. Prior to this, his career path led him via the development department of Zurich Airport to Credit Suisse. As Head Property Marketing Real Estate Asset Management there, he assumed management and specialist responsibility for marketing across Switzerland.
Mandates outside Swiss Prime Site
None
Thomas Studhalter
Vice-Chairman of the Board of Directors
1969, Horw
Position
Vice-Chairman of the Board of Directors, independent member since 2018
Committees
Chairman of the Audit Committee
Education
Business Economist, Certified Public Accountant
Professional activity
Thomas Studhalter has been at BDO since 2014 and became the CEO of BDO Switzerland on 1 January 2021. Before joining BDO, Thomas Studhalter was a partner at KPMG.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: none
Unlisted companies: Delegate of the Board of Directors of BDO AG Zurich and Director of BDO International Ltd., London; Member of the Board of Directors of Datacolor AG, Lucerne; Member of the Board of Directors of Bataillard AG, Rothenburg; Member of the Board of Trustees of the Eisner-Stiftung, Hergiswil (comprising Kamillo Eisner-Stiftung, Hergiswil, Eisner-Stiftung, Hergiswil, Stiftung Eranaika, Hergiswil), Chairman of the Board of Directors of Eisner Holding AG, Hergiswil, and Chairman of the Board of Directors of its subsidiary, Inhag AG, Hergiswil
Key Skills
Leadership, Strategy, Finance, M&A, Risk Management, Digitalisation, Human Resources, Legal
Barbara A. Knoflach
Member of the Board of Directors
1965, Hofheim, DE
Position
Member of the Board of Directors, independent member since 2021
Committees
Chairwoman of the Investment Committee
Member of the Nomination and Compensation Committee
Member of the Sustainability Committee
Education
Business Economist
Professional activity
Until 2019, Barbara A. Knoflach was Global Head of BNP Paribas Real Estate Investment Management (REIM) and Deputy CEO of BNP Paribas Real Estate S.A. in Paris. Prior to this, she worked in the financial hub of Frankfurt and held several leadership roles at SEB Asset Management, BfG Bank and Deutsche Bank. She is also a member of the Steering Committtee of the German Property Federation (ZIA) in Berlin and is a Fellow of the Royal Institution of Chartered Surveyors (FRICS). In addition, she has founded or co-founded serveral sustainable, innovative, forward-thinking platforms focusing on real estate, including LifeWorkSpace, Happy House and tinyBE.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Chairwoman and Senior Independent Member CTP NV, Amsterdam; Independent Non-Executive Director of the Board of Lendlease Group, Sydney, Australia
Unlisted companies: Deputy Chair of the Supervisory Board of Aareal Bank AG, Wiesbaden; Chief Executive Officer of LifeWorkSpace GmbH, Hofheim am Taunus and its subsidiary Happy House GmbH, Frankfurt am Main; Member of the Supervisory Board of Landmarken AG, Aachen; Member of the Advisory Board of Wöhr + Bauer GmbH, Munich
Key skills
Leadership, Strategy, Real Estate, Asset Management, ESG, Finance, M&A, Risk Management
Marcel Kucher
Chief Executive Officer
1971, Zurich
«Digitalisation is one step into the future. The most important one!»
Position
Member of the Executive Board, CEO Swiss Prime Site Group
Education
Dr. oec. publ. University of Zurich
Professional activity
Marcel Kucher has been Chief Executive Officer at Swiss Prime Site since 1 January 2026. He had previously been a member of the Group Executive Board as Chief Financial Officer since 1 July 2021. He graduated with a doctorate in economics from the University of Zurich in 2000 before starting his professional career at McKinsey & Company. From 2004 to 2011, he was CFO and Head of Corporate Development at the strategic consulting company a-connect. From 2011 to mid-2021, he worked for the listed Peach Property Group, from 2012 as CFO and from 2015 also as COO.
Mandates outside Swiss Prime Site
None
Urs Baumann
Chief Investment Officer
«Project development means knowing the customer of tomorrow.»
Position
Chief Investment Officer
Education
Dipl. Architect, Università della Svizzera Italiana
Executive MBA, University of Zurich
Professional activity
Urs Baumann has been Chief Investment Officer of Swiss Prime Site Immobilien AG since April 2021. Prior to this, he was Head Development since 2018 and Head Sustainability & Innovation since 2016 at Swiss Prime Site AG. From 2002 to 2007, Urs Baumann worked in various architectural offices in Baden, Dublin and Zurich. From 2007 to 2016, Urs Baumann was responsible for the project development business of Implenia Schweiz AG, initially in project management and from 2008 in various management functions.
Ton Büchner
Chairman of the Board of Directors
1965, Altendorf
Position
Chairman of the Board of Directors, independent member since 2020
Committees
Chairman of the Sustainability Committee
Education
Master of Science in Civil Engineering, Delft University of Technology, the Netherlands;
Master of Business Administration, IMD Lausanne, Switzerland
Professional activity
From 1989 to 1993, Ton Büchner worked as an offshore construction project manager in Europe and Asia. From 1994 to 2017, he worked for Sulzer AG, which is listed on the stock exchange, and was its CEO from 2007 to 2011. From 2012 up to and including 2017, he was CEO and Chairman of the Management Board at AkzoNobel NV, a Dutch company listed on the stock exchange.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Member of the Board of Directors of Novartis AG, Basel; Chairman of the Board of Directors of Burckhardt Compression AG, Winterthur
Unlisted companies: Consultant to Ammega; member of Adviescommissie Maatwerkafspraken Verduurzaming Industry (AMVI), Ministry of Economic Affairs and Climate Policy, Netherlands
Key skills
Leadership, Strategy, ESG, Sales & Marketing, Operation, M&A, Risk Management, R&D, Digitalisation, Finance, IT/Cyber Security, Regulatory Requirements
Brigitte Walter
Member of the Board of Directors
1959, Feldkirchen-Westerham, Germany
Position
Member of the Board of Directors, independent member since 2022
Committees
Member of the Audit Committee
Member of the Investment Committee
Education
Diploma in Savings Banking Administration
Professional activity
Brigitte Walter has more than 40 years’ expertise in all areas of banking and in real estate. She was on the Board of REAL I.S. AG Gesellschaft für Immobilien Assetmanagement until mid-2019. Most recently, she was responsible for asset and fund management following a number of years working in the areas of finance and risk (including research, compliance and auditing).
Mandates outside Swiss Prime Site
Stock exchange-listed companies: none
Unlisted companies: Member of the Advisory Board of TME Associates GmbH, Munich; representative for the southern region (Bavaria) for the German Property Federation (ZIA), Berlin
Key skills
Leadership, Strategy, Real Estate, Asset and Fund Management, Finance, Risk Management, Regulatory Requirements
Barbara A. Knoflach
Member of the Board of Directors
1965, Hofheim, DE
Position
Member of the Board of Directors, independent member since 2021
Committees
Chairwoman of the Investment Committee
Member of the Nomination and Compensation Committee
Member of the Sustainability Committee
Education
Business Economist
Professional activity
Until 2019, Barbara A. Knoflach was Global Head of BNP Paribas Real Estate Investment Management (REIM) and Deputy CEO of BNP Paribas Real Estate S.A. in Paris. Prior to this, she worked in the financial hub of Frankfurt and held several leadership roles at SEB Asset Management, BfG Bank and Deutsche Bank. She is also a member of the Steering Committee of the German Property Federation (ZIA) in Berlin and is a Fellow of the Royal Institution of Chartered Surveyors (FRICS). In addition, she has founded or co-founded several sustainable, innovative, forward-thinking platforms focusing on real estate, including LiveWorkSpace, Happy House and tinyBE.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Chairwoman and Senior Independent Member CTP NV, Amsterdam; Independent Non-Executive Director of the Board of Lendlease Group, Sydney, Australia
Unlisted companies: Deputy Chair of the Supervisory Board of Aareal Bank AG, Wiesbaden; Chief Executive Officer of LifeWorkSpace GmbH, Hofheim am Taunus and its subsidiary Happy House GmbH, Frankfurt am Main; Member of the Supervisory Board of Landmarken AG, Aachen; Member of the Advisory Board of Wöhr + Bauer GmbH, Munich
Key skills
Leadership, Strategy, Real Estate, Asset Management, ESG, Finance, M&A, Risk Management
Gabrielle Nater-Bass
Member of the Board of Directors
1968, Meilen
Position
Member of the Board of Directors, independent member since 2019
Committees
Chairwoman of the Nomination and Compensation Committee
Education
Lic. iur., University of Zurich; admitted to the Zurich bar; LL.M., University of Virginia School of Law, USA
Professional activity
Gabrielle Nater-Bass has been working for Homburger, a leading Swiss corporate law firm, since 1997. She became a partner in 2006. She has many years’ experience conducting proceedings before national courts and courts of arbitration, both in Switzerland and abroad. As a member of Homburger’s specialist real estate team, she has extensive knowledge of infrastructure projects and real estate transactions.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: none
Unlisted companies: Member of the Board of Directors of Homburger AG, Zurich; Member of the Board of Directors of LGT Bank AG and LGT Bank (Schweiz) AG; Member of the Board of Directors of the Swiss Arbitration Centre AG
Key skills
Legal, M&A, Risk Management, Strategy, IT/Cyber Security, Human Resources
Reto Conrad
Member of the Board of Directors
1966, Binningen (BL)
Position
Member of the Board of Directors, independent member since 2023
Committees
Member of the Audit Committee
Member of the Investment Committee
Education
Degree in Economics (lic. oec.); Certified Public Accountant
Professional activity
Reto Conrad has been a member of the management committees of Bachem Holding AG, Emmi Holding AG and the Coop Group since 2001. Most recently, he headed the IT, Production and Services Directorate at the Coop Group (2016 – 2022) and was previously the company's CFO (2012– 2016). Throughout this period, he was also a member of the pension fund’s investment committee.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: none
Unlisted companies: Member of the Board of Directors of Bedag Informatik AG, Berne; Member of the Board of Directors of the University Department of Geriatric Medicine Felix Platter (public institution of the Canton of Basel-Stadt), Basel; Member of the Board of Directors of erzo KVA (community association), Oftringen; Chairman of the Board of Trustees of Stiftung Alters- und Pflegeheime Binningen (retrirement and nursing homes foundation), Binningen
Key Skills
Leadership, Strategy, Real Estate, Asset and Fund Management, Finance, M&A, Risk Management, ESG, Digitalisation, IT/Cyber Security
Katia Favre
Data protection advisor
"Solid data protection is the basis of trust".
Function
Data protection advisor to the Swiss Prime Site Group in accordance with Art. 10 of the new Data Protection Act. She is the point of contact for the persons concerned as well as for the authorities and she advises Swiss Prime Site on data protection issues.
Training
Dipl. Bauingenieur
Master Immobilienmanagement Lawyer
Dr. iur., University of Zurich
Computer scientist NDL, University of Fribourg
lic.iur., University of Neuchâtel
Professional activity
Dr Katia Favre is a partner at the law firm Burckhardt AG. She has been advising companies on data protection issues since 2005, both in the area of compliance and in negotiations as well as in critical events such as data leaks. Dr Katia Favre also has many years of experience in advising on technical projects such as digitalisation, IT contracts, data transfers or telecommunications regulations.
Detlef Trefzger
Member of the Board of Directors
1962, Schindellegi
Position
Member of the Board of Directors, independent member since 2024
Committees
Member of the Nomination and Compensation Committee
Member of the Sustainability Committee
Education
Business Management Studies in Münster, Kingston upon Hull and Vienna University of Economics and Business. Awarded doctoral degree.
Professional activity
Detlef Trefzger served as CEO of the global logistics company Kühne+Nagel from 2013 to 2022. Prior to that, he worked at DB Schenker for 15 years, where he held various senior roles including member of the executive board and head of global contract logistics and supply chain management. At the start of his career, he worked at Siemens in plant engineering and as a strategy consultant at the management consultancy Roland Berger.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Member of the Board of Directors of Accelleron Industries AG, Baden
Unlisted companies: Non-Executive Director and Member of the Board of Directors at Swissport International AG, Switzerland and Luxembourg; Non-executive Director at PSA International Pte Ltd ("PSAI”), Singapore; Operating Advisor of Clayton, Dubilier & Rice Funds, UK; Founder and Chairman of Larix Equity AG, Schindellegi
Key skills
Leadership, Strategy, ESG, Operation, M&A, Risk Management, R&D, Digitalisation, IT/Cyber Security