Committees Details
Mario F. Seris
Vice-Chairman of the Board of Directors

1955, Klosters-Serneus
Position
Vice-Chairman of the Board of Directors, independent member since 2005
Committees
Member of the Investment Committee
Education
Lic. phil. I; English and education at the University of Zurich
Professional activity
From 1978 to the beginning of 2013, Mario F. Seris held various national and global management positions at Credit Suisse AG, including as Chief Executive Officer of Credit Suisse Asset Management, Switzerland from 2002 to 2005. He was also Global Head of Real Estate Asset Management at Credit Suisse AG from 2005 to 2010. He represented Credit Suisse AG as senior adviser on various boards of directors and investment committees in the real estate and fund sectors from 2011 to 2012. Since March 2013, he has been an independent advisor.
Mandates outside Swiss Prime Site
None
Key Skills
Leadership, Strategy, Real Estate, Asset Management, Risk Management, Human Resources
Christopher M. Chambers
Member of the Board of Directors

1961, London, UK
Position
Member of the Board of Directors, independent member since 2009
Committees
Member of the Audit Committee
Member of the Nomination and Compensation Committee
Education
Life Fellow Royal Society of Arts (FRSA); United Kingdom
Professional activity
Christopher M. Chambers began his professional career in investment banking, before becoming Chief Executive Officer of global hedge fund Man Investments, which he left in 2005.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Chairman of the Board of Directors of Leonteq AG, Zurich
Unlisted companies: Chairman of the Board of Directors of Lonrho Ltd., London, UK; Chairman of the Board of Directors of Oxford Sciences Innovation PLC, Oxford, UK
Key skills
Leadership, Strategy, Real Estate, Asset Management, 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; Zurich bar exam; 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 appearing 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 LGT Bank Ltd. and LGT Bank (Switzerland) Ltd.
Key skills
Legal, M&A, Risk Management, Strategy, IT/Cybersecurity, Human Resources
René Zahnd
Chief Executive Officer

1966, Bern
«Turn challenges into opportunities.»
Position
Member of the Executive Board, Chief Executive Officer
Committees
Member of the Sustainability Board
Education
Attorney at Law
Professional activity
Chief Executive Officer of Swiss Prime Site AG since 1 January 2016. René Zahnd began his professional career at Bratschi Emch & Partner Attorneys at Law in Berne and Zurich from 1994 to 1996. Thereafter, he held the following positions: co-head of Legal Services at BEKB and Dezennium AG from 1996 to 1998; head of Legal Services as well as Director of Project Development and member of the Executive Management at general contractor Losinger/Marazzi from 1998 to 2009; Implenia AG from 2009 to 30 October 2015 – as member of the Executive Management from 2010 and member of the Group Executive Board of Implenia AG from 2013 – first as director of Implenia Real Estate and thereafter as director of Modernisation & Development from February 2014.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Member of the Supervisory Board of DIC Asset AG, Frankfurt
Oliver Hofmann
Chief Executive Officer – Wincasa AG

1970, Richterswil
«Pursuing efficiency and focusing on the essentials are what make our business model successful.»
Position
Member of the Executive Board, Chief Executive Officer of Wincasa AG
Education
Banking studies, bachelor in economics and business administration, Master of Science in Real Estate of CUREM (University of Zurich)
Professional activity
Oliver Hofmann has held the positions of Chief Executive Officer of real estate services company Wincasa AG since 1 January 2013 as well as member of the Executive Board of Swiss Prime Site AG since 1 June 2013. In addition to spending a few years of his professional career in the finance department of IBM (Switzerland) Ltd, he previously worked at UBS AG for more than 15 years with other intermittent activities (investment advisor in Wealth Management, Corporate Finance, build-up of Swiss real estate advisory services). From 2007 to 2012, he held the position of head of Real Estate Advisory Switzerland at UBS AG. From 2010 to September 2013, he served as chairman of RICS Switzerland – Royal Institution of Chartered Surveyors. Oliver Hofmann is also a member of «G15 – Group of Fifteen».
Mandates outside Swiss Prime Site
Stock exchange-listed companies: none
Unlisted companies: Vice-Chairman of the Board of Directors of H Invest & Consult AG, Freienbach; Member of the Board of Directors of Crédit Agricole next bank (Suisse) SA, Lancy; member of the Board of Directors of the cooperative society ZFV-Unternehmungen, Zurich
Markus Waeber
Head Group Investor Relations & Communications
Urs Baumann
Head Group Sustainability & Innovation

«Projektentwicklung bedeutet den Kunden von morgen kennen.»
Urs Baumann ist Head Development und Member of the Executive Board bei der Swiss Prime Site Immobilien AG. Auf Gruppenstufe zeichnet er ausserdem für den Bereich Nachhaltigkeit und Innovation verantwortlich.
Urs Baumann hat an der Università della Svizzera italiana in Mendrisio und im Rahmen eines Erasmus Stipendiums an der TU Delft in den Niederlanden Architektur studiert und 2002 das Diplom erlangt. Von 2002 bis 2007 hat Urs Baumann in Architekturbüros in Baden, Dublin und Zürich als Projektleiter gearbeitet und diverse Neu- und Umbauprojekte von der Planung bis zur Realisierung geführt. Von 2007 bis 2016 war Urs Baumann zunächst im Projektmanagement und ab 2008 in verschiedenen Funktionen für die Projektentwicklung der Implenia Schweiz AG tätig, zuletzt als Mitglied der Geschäftsbereichsleitung und verantwortlich für das Portfolio des Development Deutschschweiz. 2015 schloss Urs Baumann den Masterstudiengang Executive MBA der Universität Zürich ab.
Urs Baumann ist wohnhaft in Wettingen, verheiratet und Vater von zwei Kindern. Die Werte Respekt, Ambition, Innovation, Verantwortung und Integrität haben für Urs Baumann privat wie beruflich einen hohen Stellenwert. «Sich in andere Personen hineinzuversetzen und neue Perspektiven einzunehmen helfen mir dabei, Ideen zu generieren, konsensorientierte Strategien zu entwickeln und Emotionen zu wecken.»
Urs Baumann arbeitet seit 2016 bei der Swiss Prime Site AG.
- +41 58 317 17 59
- urs.baumann @ sps.swiss
Bastian Zarske Bueno
Head Group Corporate Ventures & Innovation
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, 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, listed on the stock exchange, and was their CEO from 2007 to 2011. Between 2012 and 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
Key skills
Leadership, Strategy, ESG, Sales & Marketing, Operations, M&A, Risk Management, R&D, Digitalisation
Nina Müller
Chief Executive Officer – Jelmoli AG

1969, Zurich
«We make shopping an experience!»
Function
Member of the Executive Board, Chief Executive Officer of Jelmoli AG
Education
Master of International Business Administration, University of Vienna
Professional activity
In 1995, Nina Müller began her professional career as Sales & Marketing Manager Italy for Wolford. This was followed by positions in the retail sector in Vienna and London. In 2005, she moved to Swarovski where she held different roles, including the jewellery and crystal company’s Head of Retail Concepts and Retail Marketing until 2010. In 2011, she took up the position of General Manager to establish a new brand within Swarovski. Nina Müller has served as CEO of the watch and jewellery company CHRIST since 2016. Her key successes there included the introduction of store concepts as well as the expansion of the omnichannel approach.
Mandates outside Swiss Prime Site
Listed companies: none
Dr. Martin Kaleja
Chief Executive Officer – Swiss Prime Site Immobilien AG

1972, Maur
«Sustainability is future viability.»
Position
Member of the Group Management, Chief Executive Officer of Swiss Prime Site Immobilien AG
Education
Dr.-Ing. Electrical Engineering and Electronics
Professional activity
Since 1 January 2021 Chief Executive Officer of Swiss Prime Site Immobilien AG. Martin Kaleja began his professional career in 2001 at the Boston Consulting Group. There he was involved for nine years in management consulting in various European countries. In 2010 he joined the Allianz Suisse Group, where he held various positions. Between 2012 and 2014 he was Head of Operations Services and Corporate Real Estate. At the end of 2014 he was appointed CEO of Allianz Suisse Immobilien AG and was responsible for a portfolio of around 300 properties with a market value of over CHF 5 billion until the end of 2020.
Mandates outside Swiss Prime Site
Member of the Board of Directors of Allianz Suisse Immobilien AG, Wallisellen
Anastasius Tschopp
Chief Executive Officer – Swiss Prime Site Solutions AG
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1979, Hünenberg
«Change is inevitable! Let us use it.»
Position
Member of the Executive Board, Chief Executive Officer of Swiss Prime Site Solutions AG
Committees
none
Education
Master of Real Estate Management and Master of Banking and Finance from the School of Economics in Zurich
Professional activity
Since 1 May 2018 Chief Executive Officer of Swiss Prime Site Solutions AG and member of the Executive Board of Swiss Prime Site AG since 1 January 2021. Anastasius Tschopp is working for the Swiss Prime Site Group since 2014 - most recently as Head Portfolio Management and Member of the Exective Board of Swiss Prime Site Immobilien AG, where he shaped the portfolio with a value of 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 he assumed there management and specialist responsibility for marketing across Switzerland.
Mandates outside Swiss Prime Site
none
Thomas Studhalter
Member of the Board of Directors

1969, Horw
Position
Member of the Board of Directors, independent member since 2018
Committees
Chairman of the Audit Committee
Education
Business Administration, Swiss Certified Accountant
Professional activity
Thomas Studhalter has been CEO of BDO in Switzerland since 1 January 2021. Until 31 December 2020, he was a partner and member of the Regional Board of Management for Central Switzerland at BDO. Before joining BDO, Thomas Studhalter was a partner at KPMG.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Member of the Board of Directors of Datacolor AG, Lucerne
Unlisted companies: Member of the Board of Directors at Bataillard AG, Rothenburg; member of the Board of Trustees of the Eisner-Stiftung, Hergiswil (and member of the Board of Directors of Eisner Holding AG, Hergiswil and member of the Board of Directors of Inhag AG, Hergiswil)
Key Skills
Leadership, Strategy, Finance, M&A, Risk Management, Digitalisation, Human Resources
Barbara A. Knoflach
Member of the Board of Directors

1965, Hofheim (G)
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 Sustainability Committee
Education
Business economist
Professional activity
Barbara A. Knoflach was Global Head of BNP Paribas Real Estate Investment Management (REIM) and Deputy CEO BNP Paribas Real Estate S.A. in Paris. Prior to that, she worked in the financial hub of Frankfurt in various management positions. At SEB Asset Management, BfG Bank and Deutsche Bank, she gained many years of experience in the real estate industry as well as in finance and asset management. Among other roles, she was a member of the presidium of the ZIA (Zentraler Immobilien Ausschuss e.V.) in Berlin and is a Fellow of the Royal Institution of Chartered Surveyors (FRICS). She is also the founder or co-founder of various platforms such as LifeWorkSpace, DealEvolution and tinyBE of which the majority focus on sustainability, innovation, future trends and real estate.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Chairwoman and Senior Independent Member CTP NV, Amsterdam (since March 2021)
Unlisted companies: CEO of LifeWorkSpace GmbH, Hofheim am Taunus; member of the Supervisory Board of Landmarken AG, Aachen (from January 2022)
Key skills
Leadership, Strategy, Real Estate, Asset Management, ESG, Finance, M&A, Risk Management
Dr. Marcel Kucher
Chief Financial Officer

1971, Zürich
«Digitalisation is one step into the future. The most important one!»
Position
Member of the Executive Board, Chief Financial Officer
Education
Dr. oec. publ. University of Zurich
Professional activity
Marcel Kucher is the Chief Financial Officer of Swiss Prime Site AG since 1 July 2021. He graduated in economics at the University of Zurich in 2000 with a dissertation before starting his professional career at McKinsey & Company. From 2004 to 2011, he was CFO and Head Corporate Development at the recruitment company a-connect. From 2011 to mid-2021 he was with the listed Peach Property Group, from 2012 as CFO and from 2015 additionally as COO.
Mandates outside Swiss Prime Site
None
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, 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, listed on the stock exchange, and was their CEO from 2007 to 2011. Between 2012 and 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
Key skills
Leadership, Strategy, ESG, Sales & Marketing, Operations, M&A, Risk Management, R&D, Digitalisation
Brigitte Walter
Member of the Board of Directors

1959, Schenklengsfeld (DE)
Position
Member of the Board of Directors, independent member since 2022
Committees
Member of the Audit Committee
Member of the Investment Committee
Education
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: Vice-Chair of the Supervisory Board at Assiduus Vermögensverwaltung GmbH, Advisory Board of TME Consulting GmbH, Representative for the southern region (Bavaria) for the German Property Federation (ZIA).
Key skills
Leadership, Strategy, Real Estate, Asset Management, Finance, Risk Management
Barbara A. Knoflach
Member of the Board of Directors

1965, Hofheim (G)
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 Sustainability Committee
Education
Business economist
Professional activity
Barbara A. Knoflach was Global Head of BNP Paribas Real Estate Investment Management (REIM) and Deputy CEO BNP Paribas Real Estate S.A. in Paris. Prior to that, she worked in the financial hub of Frankfurt in various management positions. At SEB Asset Management, BfG Bank and Deutsche Bank, she gained many years of experience in the real estate industry as well as in finance and asset management. Among other roles, she was a member of the presidium of the ZIA (Zentraler Immobilien Ausschuss e.V.) in Berlin and is a Fellow of the Royal Institution of Chartered Surveyors (FRICS). She is also the founder or co-founder of various platforms such as LifeWorkSpace, DealEvolution and tinyBE of which the majority focus on sustainability, innovation, future trends and real estate.
Mandates outside Swiss Prime Site
Stock exchange-listed companies: Chairwoman and Senior Independent Member CTP NV, Amsterdam (since March 2021)
Unlisted companies: CEO of LifeWorkSpace GmbH, Hofheim am Taunus; member of the Supervisory Board of Landmarken AG, Aachen (from January 2022)
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; Zurich bar exam; 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 appearing 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 LGT Bank Ltd. and LGT Bank (Switzerland) Ltd.
Key skills
Legal, M&A, Risk Management, Strategy, IT/Cybersecurity, Human Resources