Life at Deloitte
Meet our Swiss leadership team
Simon Owen, CEO of Deloitte Switzerland, Member of the Board of Directors and Management Committee
Simon is the CEO for Deloitte Switzerland which is one of the fastest growing member firms within Deloitte’s global network, providing Audit & Advisory services to national and global clients located in Switzerland.
Simon is passionate with regards to serving clients and has held many senior client-facing roles overseeing the services Deloitte provides to its clients in Switzerland. He gives particular emphasis to innovative offerings which solve the most complex issues as well as connecting member firms across the Deloitte network to serve client globally. He is also an advocate of Deloitte’s diversity programme working with a number of private organisations in Switzerland on this increasingly important area.
He has been with Deloitte for nearly 20 years, over 15 of which have been as a Partner. Prior to joining Deloitte Simon spent 7 years working in the banking sector. His technical specialisms are risk, governance, compliance and other control-related matters and has previously held leadership roles relating to Innovation and Risk Advisory and is a member of the Deloitte North West Europe LLP Executive.
Simon is an alumnus of Warwick (MBA), Royal Holloway (MSc) and Kingston (BA).
Deputy CEO and Managing Partner, Clients & Markets
Reto is the Deputy CEO for Deloitte Switzerland and the Managing Partner for Clients & Markets. Reto is a Swiss international corporate tax specialist with more than 15 years of experience in the area of cross-border structuring, M&A and business reorganisations. Reto is also a member of the board of Deloitte North West Europe.
Thierry Aubertin, Managing Partner Audit & Assurance, vice chairman of the Board of Directors and Member of the Management Committee
Thierry Aubertin is the Managing Partner of Audit & Assurance in Switzerland and a member of the Swiss Leadership Team. Since 2008, he is also the Practice Senior Partner for the French-Speaking part of the country. He specialises in the audit of large groups and coordination of multinational audits. He has deep expertise in the banking industry, and has also worked with consumer business, life sciences and public sector clients.
Bjørnar Jensen, Managing Partner, Consulting
Bjørnar is the Managing Partner Consulting in Deloitte's Swiss practice.
Since joining Deloitte as part of the acquisition of Monitor Company in 2011, he has worked on growth and innovation topics across a range of industries, As lead client service partner, he has led our relationship with one of the world's top three consumer care companies, and also one of the pre-eminent food and beverage companies worldwide. In Switzerland, he looks after the TMT sector, with a particular emphasis on service innovation.
Bjørnar is an active member of the EMEA Consulting leadership, and is a regular commentator in Swiss media on issues related to innovation and competitiveness.
Jean-François Lagassé, Managing Partner, Financial Advisory
Jean-François is the Managing Partner for Financial Advisory in Switzerland and a member of the Swiss Leadership team. He has more than 20 years of professional experience and has worked in the United States, Canada and Switzerland. Jean-François successfully completed numerous M&A Advisory and valuation mandates in sectors such as financial services, consumer business, technology and telecom.
Jackie Hess, Managing Partner, Tax & Legal
Jackie is the Managing Partner for Tax & Legal and a member of the Swiss Executive team. She has more than 20 years of experience serving some of Deloitte’s largest multinational clients. Her areas of focus include business model optimization in the BEPS era, Swiss ruling and tax holiday negotiations, tax controversy, and audit defense. In addition, she has extensive experience in cross-border tax planning including substance reviews, IP structuring, and finance planning. Jackie’s industry focus is life sciences where she advises predominately US-listed companies in the biotech and medtech space that have their European headquarters in Switzerland.
Mark Carter, Managing Partner, Risk Advisory
Mark Carter is the Managing Partner for Risk Advisory in Switzerland and a member of the Swiss Executive team. Mark has extensive IT consultancy experience, mainly helping organisations transform their information security capabilities. Mark has worked across various risk management functions including IT security, information risk management, operational risk, and data privacy. His background includes having been the global Head of Security Policy & Compliance for a FTSE100 media organisation in the UK.
Anna Samanta, Managing Partner, Talent
Anna is the Managing Partner for Talent and a member of the Swiss Executive team. Anna also leads our Integration and Separation Advisory team in Zurich. She joined Deloitte in 2005, and has more than fifteen years’ experience providing advice and challenge to senior management in planning and delivering complex cross-border integrations and operational carve outs. She is an experienced merger integration advisor and program manager with significant international experience and has advised on more than 30 deals.
Nick Davies, Chief Operating Officer
Nick is the Chief Operating Officer for Deloitte in Switzerland. He has been with Deloitte since 1996, after beginning his career in the financial services industry. He was the Managing Partner for Consulting from 2011-2016, where he led the business through a period of unprecedented growth. He has worked primarily on technology projects ranging from the strategic to those requiring complex international implementation. Nick has worked closely with the Swiss practice since 1999 and officially moved to Switzerland in 2007.
Anna Celner, Managing Partner, International
Anna is Managing Partner, International Relations, responsible for bringing the best of the Deloitte global network to Swiss clients and for managing global relationships of the Swiss firm. She is a Vice Chairman at Deloitte UK and the Global Lead Client Service Partner for a major Financial Services organisation. She has been a member of the Swiss Executive team since 2010 and has more than 20 years of experience serving global financial services institutions in Europe and the US in the areas of strategy development, operating model design and implementation, profitability enhancement, and large transformational programmes focused on regulatory change, governance, risk, shared services, and outsourcing/offshoring.
Stuart Diack, Managing Partner Quality, Risk & Security, Member of the Management Committee
Stuart Diack has a cross-service line leadership role in quality and risk management. He has deep experience of the changing regulatory environments across Europe and the world. A UK Chartered Accountant and Licensed Audit Expert in Switzerland, Stuart is an audit professional by trade, and was previously a lead public policy, quality and risk partner in the UK firm’s audit practice. Stuart has more than 20 years’ professional experience with the firm.